[API] /account returns not documented structure

[EnoRage]

How it is described:
https://api.tzstats.com/explorer/account/tz2TSvNTh2epDMhZHrw73nV9piBX7kLZ9K9m
Response:

{
  "address": "tz2TSvNTh2epDMhZHrw73nV9piBX7kLZ9K9m",
  "address_type": "secp256k1",
  "delegate": "tz2TSvNTh2epDMhZHrw73nV9piBX7kLZ9K9m",
  "manager": "",
  "pubkey": "sppk7bn9MKAWDUFwqowcxA1zJgp12yn2kEnMQJP3WmqSZ4W8WQhLqJN",
  "first_in": 360996,
  "first_out": 360997,
  "last_in": 798547,
  "last_out": 798547,
  "first_seen": 360996,
  "last_seen": 798547,
  "delegated_since": 0,
  "delegate_since": 361000,
  "first_in_time": "2019-03-20T23:10:52Z",
  "first_out_time": "2019-03-20T23:11:52Z",
  "last_in_time": "2020-01-27T15:48:29Z",
  "last_out_time": "2020-01-27T15:48:29Z",
  "first_seen_time": "2019-03-20T23:10:52Z",
  "last_seen_time": "2020-01-27T15:48:29Z",
  "delegated_since_time": "0001-01-01T00:00:00Z",
  "delegate_since_time": "2019-03-20T23:14:52Z",
  "total_received": 4202918.18456,
  "total_sent": 2249591.094354,
  "total_burned": 0,
  "total_fees_paid": 0.085097,
  "total_rewards_earned": 1172359.071348,
  "total_fees_earned": 191.42406,
  "total_lost": 0,
  "frozen_deposits": 2824832,
  "frozen_rewards": 87364.083332,
  "frozen_fees": 22.206582,
  "unclaimed_balance": 0,
  "spendable_balance": 213659.210603,
  "total_balance": 3038513.417185,
  "delegated_balance": 24983342.325077,
  "total_delegations": 31,
  "active_delegations": 13,
  "is_funded": true,
  "is_activated": false,
  "is_vesting": false,
  "is_spendable": true,
  "is_delegatable": false,
  "is_delegated": false,
  "is_revealed": true,
  "is_delegate": true,
  "is_active_delegate": true,
  "is_contract": false,
  "blocks_baked": 15107,
  "blocks_missed": 53,
  "blocks_stolen": 337,
  "blocks_endorsed": 238342,
  "slots_endorsed": 472966,
  "slots_missed": 530,
  "n_ops": 238992,
  "n_ops_failed": 0,
  "n_tx": 65,
  "n_delegation": 1,
  "n_origination": 0,
  "n_proposal": 2,
  "n_ballot": 3,
  "token_gen_min": 2,
  "token_gen_max": 8144,
  "grace_period": 200,
  "staking_balance": 28021855.742262,
  "rolls": 3502,
  "rich_rank": 29,
  "traffic_rank": 0,
  "flow_rank": 0,
  "last_bake_height": 798530,
  "last_bake_block": "BKxWH3nQ29jkZfED3QpqBkU9vhGcixqRoHsKjbA7YKHTK9nBXNi",
  "last_bake_time": "2020-01-27T15:31:29Z",
  "last_endorse_height": 798547,
  "last_endorse_block": "BKmFFRn7HJbhfygiibGk88DoLTLqKAGta3xvrEQbaBneYQ2vBNg",
  "last_endorse_time": "2020-01-27T15:48:29Z",
  "next_bake_height": 798562,
  "next_bake_priority": 0,
  "next_bake_time": "2020-01-27T16:03:29Z",
  "next_endorse_height": 798549,
  "next_endorse_time": "2020-01-27T15:50:29Z"
}

How it works with another address:
https://api.tzstats.com/explorer/account/tz1VFiQwFL36Ru7EtugLjXVh3dqp9B4KRSAV
Response:

{
  "address": "tz1VFiQwFL36Ru7EtugLjXVh3dqp9B4KRSAV",
  "address_type": "ed25519",
  "delegate": "tz1Vyuu4EJ5Nym4JcrfRLnp3hpaq1DSEp1Ke",
  "manager": "",
  "pubkey": "edpkuqrs2A3DjNnVVYJEbkk5Lf18PzXwryZxnzwUNaDENhwDdw6iQo",
  "first_in": 678309,
  "first_out": 678311,
  "last_in": 794781,
  "last_out": 793743,
  "first_seen": 678309,
  "last_seen": 794781,
  "delegated_since": 793743,
  "delegate_since": 0,
  "first_in_time": "2019-11-03T18:27:17Z",
  "first_out_time": "2019-11-03T18:29:17Z",
  "last_in_time": "2020-01-25T00:39:33Z",
  "last_out_time": "2020-01-24T07:17:44Z",
  "first_seen_time": "2019-11-03T18:27:17Z",
  "last_seen_time": "2020-01-25T00:39:33Z",
  "delegated_since_time": "2020-01-24T07:17:44Z",
  "delegate_since_time": "0001-01-01T00:00:00Z",
  "total_received": 111.326197,
  "total_sent": 19.04,
  "total_burned": 0.771,
  "total_fees_paid": 0.2742,
  "total_rewards_earned": 0,
  "total_fees_earned": 0,
  "total_lost": 0,
  "frozen_deposits": 0,
  "frozen_rewards": 0,
  "frozen_fees": 0,
  "unclaimed_balance": 0,
  "spendable_balance": 91.240997,
  "total_balance": 91.240997,
  "delegated_balance": 0,
  "total_delegations": 0,
  "active_delegations": 0,
  "is_funded": true,
  "is_activated": false,
  "is_vesting": false,
  "is_spendable": true,
  "is_delegatable": false,
  "is_delegated": true,
  "is_revealed": true,
  "is_delegate": false,
  "is_active_delegate": false,
  "is_contract": false,
  "blocks_baked": 0,
  "blocks_missed": 0,
  "blocks_stolen": 0,
  "blocks_endorsed": 0,
  "slots_endorsed": 0,
  "slots_missed": 0,
  "n_ops": 26,
  "n_ops_failed": 1,
  "n_tx": 21,
  "n_delegation": 4,
  "n_origination": 0,
  "n_proposal": 0,
  "n_ballot": 0,
  "token_gen_min": 3,
  "token_gen_max": 11163,
  "grace_period": 0,
  "staking_balance": 0,
  "rolls": 0,
  "rich_rank": 23549,
  "traffic_rank": 0,
  "flow_rank": 0,
  "last_bake_height": 0,
  "last_bake_block": "",
  "last_bake_time": "0001-01-01T00:00:00Z",
  "last_endorse_height": 0,
  "last_endorse_block": "",
  "last_endorse_time": "0001-01-01T00:00:00Z",
  "next_bake_height": 0,
  "next_bake_priority": 0,
  "next_bake_time": "0001-01-01T00:00:00Z",
  "next_endorse_height": 0,
  "next_endorse_time": "0001-01-01T00:00:00Z",
  "delegate_account": {
    "address": "tz1Vyuu4EJ5Nym4JcrfRLnp3hpaq1DSEp1Ke",
    "address_type": "ed25519",
    "delegate": "tz1Vyuu4EJ5Nym4JcrfRLnp3hpaq1DSEp1Ke",
    "manager": "",
    "pubkey": "edpkvNz7AFBaPLxgRXTQa7wKSCEGw9vwxmaQQA1p2Fx5KAH2oYu9jL",
    "first_in": 259217,
    "first_out": 259219,
    "last_in": 798453,
    "last_out": 798453,
    "first_seen": 259217,
    "last_seen": 798453,
    "delegated_since": 0,
    "delegate_since": 267088,
    "first_in_time": "2019-01-06T18:46:51Z",
    "first_out_time": "2019-01-06T18:48:51Z",
    "last_in_time": "2020-01-27T14:13:49Z",
    "last_out_time": "2020-01-27T14:13:49Z",
    "first_seen_time": "2019-01-06T18:46:51Z",
    "last_seen_time": "2020-01-27T14:13:49Z",
    "delegated_since_time": "0001-01-01T00:00:00Z",
    "delegate_since_time": "2019-01-12T11:49:35Z",
    "total_received": 19561.091364,
    "total_sent": 7080.706701,
    "total_burned": 0.031,
    "total_fees_paid": 6.902242,
    "total_rewards_earned": 8579.599998,
    "total_fees_earned": 0.853818,
    "total_lost": 0,
    "frozen_deposits": 17280,
    "frozen_rewards": 538.4,
    "frozen_fees": 0.036448,
    "unclaimed_balance": 0,
    "spendable_balance": 3235.468789,
    "total_balance": 20515.505236999998,
    "delegated_balance": 193420.775675,
    "total_delegations": 245,
    "active_delegations": 114,
    "is_funded": true,
    "is_activated": false,
    "is_vesting": false,
    "is_spendable": true,
    "is_delegatable": false,
    "is_delegated": false,
    "is_revealed": true,
    "is_delegate": true,
    "is_active_delegate": true,
    "is_contract": false,
    "blocks_baked": 114,
    "blocks_missed": 8,
    "blocks_stolen": 3,
    "blocks_endorsed": 3423,
    "slots_endorsed": 3440,
    "slots_missed": 127,
    "n_ops": 8165,
    "n_ops_failed": 0,
    "n_tx": 4731,
    "n_delegation": 1,
    "n_origination": 0,
    "n_proposal": 3,
    "n_ballot": 6,
    "token_gen_min": 3,
    "token_gen_max": 5185,
    "grace_period": 200,
    "staking_balance": 213936.280912,
    "rolls": 26,
    "rich_rank": 2461,
    "traffic_rank": 0,
    "flow_rank": 0,
    "last_bake_height": 0,
    "last_bake_block": "",
    "last_bake_time": "0001-01-01T00:00:00Z",
    "last_endorse_height": 0,
    "last_endorse_block": "",
    "last_endorse_time": "0001-01-01T00:00:00Z",
    "next_bake_height": 0,
    "next_bake_priority": 0,
    "next_bake_time": "0001-01-01T00:00:00Z",
    "next_endorse_height": 0,
    "next_endorse_time": "0001-01-01T00:00:00Z"
  }
}

There is "delegate_account": {} inside second response

[echa]

Yeah, that's missing in the docs because it's an unstable/internal feature that may break. The same applies to the manager_account field when the account is a contract. We embed related accounts to avoid extra calls for our block explorer but may remove these embeds or add a query arg to enable/disable embeds in the future.