{
  "manageEntity": {
    "action": "Save",
    "entityId": "1678944086",
    "entityType": "Track",
    "nonce": "0x1ad0e03449642ec9ba4cedf4ee35fb093e771001c1d99211c8dddb9a9f35cb71",
    "signature": "0x53c053cbac0e0a505d86b5981eda3c6f2c29a5750cba836af5ab5b8b41fd690730c6483f835403580cf3fe5a3493a0eb4b2e75b8037b02850931eff6fbe56b3f1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}