{
  "manageEntity": {
    "action": "Save",
    "entityId": "1768123433",
    "entityType": "Track",
    "nonce": "0x664deeb1ae69da4e85cdc48dd2810dba58b58aefb8b4b8f7d7cdb8c3cba6368e",
    "signature": "0x19f97e983f0f1398f1de1bf3365afab53d8e3e918acb909225129b5ca3c725ff58edced626bc21c0c2d838a5151b1abc7c0addbab96eb55c4df9f77c24ce52801c",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}