{
  "manageEntity": {
    "action": "Save",
    "entityId": "1045994753",
    "entityType": "Track",
    "nonce": "0xd888565b418099a3e7c42974bc4b8d7de9d08a3d62c7421925c554dbd9cce127",
    "signature": "0x41d34e7831f31271e367de75e9a77bd5b79c50ce60316b7c09859a8473d51d567bf51dbec41ff516bfb25825975c6fea2bd7b239251c2eadb3aa22ebc785c6c71c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}