{
  "manageEntity": {
    "action": "Save",
    "entityId": "1594414288",
    "entityType": "Track",
    "nonce": "0xf1a081707643119d201b2cd22d7779e04a8a83322a1b4812a08ed8f3f33e150e",
    "signature": "0xe55181b384d1a1e67117d12323632b07636b599b0af32f5c3502357c3b75d9b012692526d97825d878f705f3f6d5567c9b27068a90c214adf78725e0e242fb3d1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}