{
  "manageEntity": {
    "action": "Save",
    "entityId": "1753298338",
    "entityType": "Track",
    "nonce": "0xbcefe493974f3f7508f8ed23db4b46e2ad953155305195a7107a3624f21693b2",
    "signature": "0x2956c69adf25689326d3ea944c2946958c4e8ba57954aa4fc54356672cdb276e38cdfaff15195b0e0e80c72107f8691fc8e0879ecd2acf552f36a5e85025c6921c",
    "signer": "0x48c57b64a5a12Dc7C7742Fdb629EEce52FF5591D",
    "userId": "930634116"
  }
}