{
  "manageEntity": {
    "action": "Update",
    "entityId": "253853465",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xf616fac95524291e9dd373940418cb4ccff5e1031221c428b7bfae8142aff687",
    "signature": "0xe21b72df9e445af21b09533c7572047454ab76a0e0a0c74b02e6f7492cfd93d234871955fcdedda1606a0f6b506062210b98c4a873246e162fc93d058a789c801c",
    "signer": "0x0c719578497D6a1FD2618b1BB0EA71951D9d5C1c",
    "userId": "253853465"
  }
}