{
  "manageEntity": {
    "action": "Save",
    "entityId": "688332721",
    "entityType": "Track",
    "nonce": "0x22ebe60c6fe8667ba5319c496bbaab446ebbcbcadc44ed17e10ab1d85f78ba94",
    "signature": "0x44784b0a263ede34a680a5b5b39253c71387446efbc9b712d80066fde729f6504f7f53acda53a6899c4adc07cebe55648549c0292cee390c871d92fa395f77bc1c",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}