{
  "manageEntity": {
    "action": "Save",
    "entityId": "283817844",
    "entityType": "Track",
    "nonce": "0x97f285b2d8f8915c7704bbbfb89cb73f464051a4ae876b30faa4637e8e555338",
    "signature": "0xa6f3c9da1612b2a60dcf7fe93ea434ddae3744822d1cd8d09ae8c85bd4a697692dee5733e65c3e937a96fdf7496eaf545814fcd284f6038ddb1b9f4791acda2c1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}