{
  "manageEntity": {
    "action": "Update",
    "entityId": "600984032",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x3646c587ff7ba657d1d1bb3e714bceed1dee64d3992c853a81108ed72ab5f6ea",
    "signature": "0x34e877254a05895bbdde4a3bbd5f5a23aa8aa73c7fc2a56dd41be93159fea41e212309e4f285cd6760c2ddcd0c0f6e1cecc024fbf7d9d185eeb7ae0e409be6911b",
    "signer": "0x4209027Fe78Cf6820a14aE8e5F03B6E282fff14A",
    "userId": "600984032"
  }
}