{
  "manageEntity": {
    "action": "Update",
    "entityId": "473911971",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x08d1634a1fe6f69ee66fd6e68e100d72e373ccfb24a9a62961320c9ccfa0cf15",
    "signature": "0x784eb38e85e9d9ee60d7f59421ac451ad844fedfaae7e009fef962da3aca04ab00e8b5f11b70ed4e8aea64bc9b82e568bd6f8ed59a734c724511f37c1eab0d601c",
    "signer": "0xfffF643204D053ae5bFC296Aa20F15313084C719",
    "userId": "473911971"
  }
}