{
  "manageEntity": {
    "action": "Update",
    "entityId": "512022848",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xa2bdc59b1df7e59da153cbcdcd9104ccc3be1e285fa53186038e184493cc835c",
    "signature": "0xf77278654b2c454b9b1685b675cd863b12fefc5d5cdc964eab4abae54fbad8f57e4bdaaafd3ab34f60fd61310074af5d23366175306a21175738eae0684855701b",
    "signer": "0x9b682c779356138D1D188CAB373b0F44a2d43d09",
    "userId": "512022848"
  }
}