{
  "manageEntity": {
    "action": "Save",
    "entityId": "1553876129",
    "entityType": "Track",
    "nonce": "0x130c7aff3dfab3fe36c76f3646c3bfc90a0cf50c3f334d7e16ce6d03a0e9526f",
    "signature": "0x6ebfe0d1d4dcaddb3bda46dd2f29b63e1d6b6c16b4a860ccf2adb764ccdbc1215468820d16e6ed8a904256d2a601a8c671a93dd9b44ce5a7e79a4e56e03602921c",
    "signer": "0xea79EEd60D97517387a63Acc5fd3BeE2227F1658",
    "userId": "220230236"
  }
}