{
  "manageEntity": {
    "action": "Save",
    "entityId": "1496284369",
    "entityType": "Track",
    "nonce": "0x77164b2efebc37d65d0f8494c44304ad5bb9dd4ddd416601ac358cf5d8e7bf50",
    "signature": "0x7adc33b714fc8f34ce7ab491f3390e4781b6837ef263d31239492f0c3548d9b42467b5a7be0c0c5061b2137c16423a03a9fc8f3f4486542f5515299161733c921c",
    "signer": "0xcd864e8A0A043bf1B2DA4106C35c1daF234468a5",
    "userId": "784246910"
  }
}