{
  "manageEntity": {
    "action": "Save",
    "entityId": "1544011263",
    "entityType": "Track",
    "nonce": "0xcb7d8a25234a61ce2b9ed96c40fdc05ca5a35053dd5eb227fd38929b142e9461",
    "signature": "0x05d867e33a730e44a60de75714c79d6aaacc1483041dc86fc9af590588a1b2e95872863bdd206278f876dfbdc5a1018c9ee2065d54b82b0c503dcc953b6719421c",
    "signer": "0x5D012C880480A2E1ab4345f6F374CFf73e040331",
    "userId": "10449019"
  }
}