{
  "manageEntity": {
    "action": "Save",
    "entityId": "956582223",
    "entityType": "Track",
    "nonce": "0x983896a6f38faac1f44de103211e21818a64c4f5abd039d8f2c3ca41c7bc7063",
    "signature": "0x40d13ac339c32d05f1d5150ffc4f6258266ab59f17cfeae7918e10958790703c11f6d2c980205d0c3bc7ab488e0a1ce39dd0107dc3ffa83cdde207a0d4cbb8b31c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}