{
  "manageEntity": {
    "action": "Save",
    "entityId": "262784",
    "entityType": "Track",
    "nonce": "0x258dda4a869d5571a93a0dfcd4b7402e8a73e499f50062a12ee6025dca9111eb",
    "signature": "0xb4a7f71b50d3f1df6ed1df997973f4f884bb4a8d939c2d3719de4c7b88e5f0fe5a776ac23024d2fccbf2178eee781e0ad3c239e6fc1c9718651ba0e025892a131b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}