{
  "manageEntity": {
    "action": "Save",
    "entityId": "2045216507",
    "entityType": "Track",
    "nonce": "0xb3dafda7460e7b69a1fdd6fc70378fa9f910f49b85dc550eeece1047b83a1937",
    "signature": "0x5ee6a14f3dc02a3c8250257f6fba8c2548a4b1ad5c200434933978ec2b818c78253f45d5c81897765a570e74033c2f6ec286884d1e4542c5df7ffee4ce3f704e1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}