{
  "manageEntity": {
    "action": "Save",
    "entityId": "273063",
    "entityType": "Track",
    "nonce": "0x4b04bbfcc20bd15e416b63750f374fb738f17c1ce3768231f334dda43d0ac8f4",
    "signature": "0x43d3ea684a89c41722cecd971c50378bf439ac75a92a57a11de5f77812b249fd6d1bce985caa7ffd1cff9762a58dacc9926ef62556d2a015a540ba131a3dee151c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}