{
  "manageEntity": {
    "action": "Save",
    "entityId": "810054479",
    "entityType": "Track",
    "nonce": "0x03ae38886dde2a21ae1bae9f66f9e92a9dca066d6dcaf4ffa2cec1dd25689bd9",
    "signature": "0x47f2c6e543b836a1859cbfe0450b2f93c2f7a8407fc751c0326b2de10ca6b5fc5a84835de0a618c22ee006f5e959ec9ebbe09835dc1f689a087e7f24f964170d1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}