{
  "manageEntity": {
    "action": "Save",
    "entityId": "814305",
    "entityType": "Track",
    "nonce": "0x3b291ea540bf4b4814b052b870a2868fb788ed7658195d5338e5d7925f9c85e6",
    "signature": "0x7319349cc94b4a0da242e91a340d52ca151afdd1801d711e2d493e9db1ebe88c3720f618b23827218367609abfb2811cbe64f6ddec7e78aa670f639f75f142d01b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}