{
  "manageEntity": {
    "action": "Save",
    "entityId": "1896389841",
    "entityType": "Track",
    "nonce": "0x7e0712ff6355b156f050cb98fcdda897fe51a3de878febb89c2ea4857e75dd28",
    "signature": "0x54d2a40a8dc41e1904022d803f90f54a421c1cf66031bb39e8526ed436cba8111193ba909920e76f2d06f77a3dea7ab6fa8d04dde3ac6785baf5dbaebe24b7fa1b",
    "signer": "0xEeea4f65FD2D7EffBC68176EAbe8544B088Aed57",
    "userId": "584616263"
  }
}