{
  "manageEntity": {
    "action": "Save",
    "entityId": "593772880",
    "entityType": "Track",
    "nonce": "0x6d9a7497999d1a44e6a0092e865de378f396188c2de8018c39832013879278d7",
    "signature": "0x62032393264463abd85743c47bfc8750c69df5a0c971a1df26c6b8d901401b3711c47744a83077496b0fb901f53303594bb839cae4339e6123c44b2c3bdb734d1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}