{
  "manageEntity": {
    "action": "Save",
    "entityId": "1037739",
    "entityType": "Track",
    "nonce": "0xd8942ad7227d4bee8757d5914a54c702dab4d2b36ce8a6a24b0ab54a3ba2a7e7",
    "signature": "0x86fc9ef8cb294c44a640782f63585c18189cd20e1236de03738635003ffcb2f9049e6f40c039af407911f7c9740327e9438ae90f06e39fc4000f3d47fb79e6b81c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}