{
  "manageEntity": {
    "action": "Save",
    "entityId": "1585076674",
    "entityType": "Track",
    "nonce": "0x69da513f9fca0929ed3f9b8d6e8a9a2738829c7151d8fe6e6c4bb385f35790f0",
    "signature": "0x7996ed25fa0c056391da0c1a93f785b99785eb57fc4f55e7f317aa84958fa96b014c3448c8a6d4a1a28ddfa32ce5e0005198a7fced7d8e1e51e9df77bd5a6e491b",
    "signer": "0xd9bA17330fFb3Ea1356C5eC14971D9e1f2cb5200",
    "userId": "337125448"
  }
}