{
  "manageEntity": {
    "action": "Save",
    "entityId": "246671743",
    "entityType": "Track",
    "nonce": "0x10a8e80034865a3b6e5bee48ad3c7d25abb551ae721660f9d896cad51103e025",
    "signature": "0xd4449d7a8a1e23f463da0b1139851705e97882213d4898765dfe6e3383a2854c7165683398475678b1be6f143e8901790614e5e38ebf07899b5bb95724f46b8c1c",
    "signer": "0x5D012C880480A2E1ab4345f6F374CFf73e040331",
    "userId": "10449019"
  }
}