{
  "manageEntity": {
    "action": "Save",
    "entityId": "49641785",
    "entityType": "Track",
    "nonce": "0x1ba1c72d75a03f313066695cda28d94f6a1f82265c1f9f313984d4caf1cfee23",
    "signature": "0x79e27b7c292325982d537539c5d77fd87aa77362cc3d8cfae57f6bb878727c7b311f27b79951dc5612b9b49ac8cd52cc792c27e927ca85442a63d828d68b5caa1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}