{
  "manageEntity": {
    "action": "Update",
    "entityId": "750444576",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xa4e21234d307e12d8b00cdc9e6b284754537043f843d4ea7118e4e225b17de7d",
    "signature": "0x6902dce08ade7b9fa33dc4667404c789aa0d36fd26088fa9449e0a8a87c3792e0927a1eb733f7b7bba91ec81fca85f4b337f04935a834e738b5d73d9c258510b1b",
    "signer": "0x393c8f4ef27d07C48109C752a4617bF5A62d4407",
    "userId": "750444576"
  }
}