{
  "manageEntity": {
    "action": "Save",
    "entityId": "711864328",
    "entityType": "Track",
    "nonce": "0x13467c6f4574c76ffcd51e3b2b786e20a41dd85367852e9b48c5adea84b76eca",
    "signature": "0xd887e99520d1d91a3b1be9b5dab04b615f54f9e3427e3de5de3a83a5159db4fc5f86fd2491c52c70e083faed56853e7213c2d5e57548818c23e34a94cdb4789a1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}