{
  "manageEntity": {
    "action": "Update",
    "entityId": "548675890",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xb4678541fc791355aa1d694691e0925d0568ecba1de5624237d17e83371e5423",
    "signature": "0x64662e982a95fa871a2b936ea6dcf2616833307186c7eba322407ae0f34357b144238895d95f5b4f7b02677fcdf265fd3613154f463ba6249372ed64cfb3be6d1c",
    "signer": "0x7597c344f2cA84759691973cED6234c95796DEf5",
    "userId": "548675890"
  }
}