{
  "manageEntity": {
    "action": "Save",
    "entityId": "784795699",
    "entityType": "Track",
    "nonce": "0xb04e1170fea73a58ba529377d4e8928ba9e07d4a5c78480329108d5d5293526b",
    "signature": "0x0b2e6a24e53dcd6d25c63ac1c30c4d36f5e1f0f055377594fb1082bf3013944e382bec6a50ef3ccb86c7684883cb127a0d923b12dde24758cb5c6f8e4369027e1b",
    "signer": "0xF7F56DF4D8a2Ae2BF9Ca645DC684f84c37BbDaFe",
    "userId": "116272245"
  }
}