{
  "manageEntity": {
    "action": "Save",
    "entityId": "2117948319",
    "entityType": "Track",
    "nonce": "0xd796c6b47d9d2a84797210f0f4af57be8d7e67f2adb4ed1a05b217910969abf1",
    "signature": "0x547a0daf9e0942c22f99a7a7b32ad3c798914aa295930dc917270b0a23279bc70f39ec233217acbd2c5df62a60cf2b1cb386664189069fc0beb35988324731961c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}