{
  "manageEntity": {
    "action": "Save",
    "entityId": "1147753459",
    "entityType": "Track",
    "nonce": "0x94961414fb62353f794f36eb7d5866cc53a4df15255f1e12d1de80eb57597eb8",
    "signature": "0xd56ba98ddbb173adabcff82495d086acd0a2e451ab7d824741165826bea874fb48bf625e3f8d9cc73ed468741b257687c1a1b46e9fc4cb7f37133ec6d4aed71c1c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}