{
  "manageEntity": {
    "action": "Save",
    "entityId": "17439757",
    "entityType": "Track",
    "nonce": "0x0243b6aa3e1bcff8c22b1c82b579974e6a8302d4cb283a4e2531d456df1d4c02",
    "signature": "0xd71f045ee94d834481743fb33fd9aceb11a7ecd81ce787d432c93a3b73e6adfe38a322a411e39c3c61cbabedf0cce9901ac9373ebf39fe8efe17df39ec3d1eb41c",
    "signer": "0x4dafC3e774A1033C5604372f17ccBDcE545f478D",
    "userId": "889450527"
  }
}