{
  "manageEntity": {
    "action": "Save",
    "entityId": "122650138",
    "entityType": "Track",
    "nonce": "0xa017af7e4697698ac5a1a529e297f3512ec30979de7b3f9173befee95391cb2d",
    "signature": "0x86e69e0fe0fc7fa47db76fc7e43b046cc8a97bcc34e7b3558981810e78c4927813b37c7fcba070057c5bd0fb0bd39b6fd016edcacd83a58bc98a92eafc06f39b1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}