{
  "manageEntity": {
    "action": "Save",
    "entityId": "1224588217",
    "entityType": "Track",
    "nonce": "0x50a7d926824c0e7e71799b1bbedfd1dd7912336d78a1fd88a3b3732e330da6c9",
    "signature": "0xde23f8b8f464c4c3d6ea8e1c7f72e6c58f4775a8d8ef55234f11c2bb1bddf2ca33110e00e338955163c9faefc5f6f38c7c37e6d56bb6e1bdf45af6db0a958a8f1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}