{
  "manageEntity": {
    "action": "Save",
    "entityId": "1386323775",
    "entityType": "Track",
    "nonce": "0x2d50efa49033b54ed4bd27747a2ed5e41d357cbdc1fd1b78e97bedb6840c0847",
    "signature": "0xbdb95e9dbaed4ea6ac21b1f01bdbf4744dceb3c714c9804c97cf0039867047cf2f45430afd95efe4f3747eec6474d884535f4b8bece48dfd1512121bb58e557d1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}