{
  "manageEntity": {
    "action": "Update",
    "entityId": "638982766",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x7b6d9ff1017732c03009363cbcd99227b361cd7915677561cdcce0b5aa831686",
    "signature": "0x4976b517c88631e74dfe67c98a62296cd39809dea33e7d825c3ab12c3165716c6d24dff188ce1a06dd4db83ce7be04af2c43e54706d37edc558ef08aaa73acc51b",
    "signer": "0x1bB0a721266d0519cE401Fdb63389ce33416259e",
    "userId": "638982766"
  }
}