{
  "manageEntity": {
    "action": "Save",
    "entityId": "221459096",
    "entityType": "Track",
    "nonce": "0xee4074d1910180f8307208ac401839842cdc3459685cedfa556d58b62107bdc5",
    "signature": "0x56ec2f8e05f367b5d33919e0f742346519ce0ee7aa5996a518af107519ffa8a230a4e1c944f7e5afba801cd897890f1a7e98c5faf6761ad5f4e4b16447ff8fe81c",
    "signer": "0xd1bC12b8b46f2FAa152aB791052b4a26826F86F5",
    "userId": "481080235"
  }
}