{
  "manageEntity": {
    "action": "Save",
    "entityId": "1388421051",
    "entityType": "Track",
    "nonce": "0xd02b0ae53a61fae0d1e2ea041891a80e1b13976ea7aba8355ea75d7f5019dc95",
    "signature": "0xc3ca140d19224683821c26c223d42c247bbd3563e53798bd2331b38b2a003cdd1e74db4117076cc79d4028b9f8bb74fb4f9cca8f389c203fde558f1d539c7b911b",
    "signer": "0x793bbEFbb3Cf1e6529B90296e502145aCcCDE8d6",
    "userId": "838777725"
  }
}