{
  "manageEntity": {
    "action": "Save",
    "entityId": "264735",
    "entityType": "Track",
    "nonce": "0xc280803079a3a73f4c5e53119838c84da0247b3c947757935850b27d0319e96c",
    "signature": "0x4d8bf14e3208d38c270bc96a9d1167e32aff0a25c9f270b4acbf70e059b6c1552f92307b1ec4c65585b194563ecd18146792941cbc13a6eb2a616721e6ebd7c11c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}