{
  "manageEntity": {
    "action": "Update",
    "entityId": "256556644",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x964d3d3f8847fe861f92d02f07872cfd6bb11729524ba438d2bc048922084711",
    "signature": "0x6b5e597f96027ba2aae4e1e08ed3650ccb4acbe02adf0c694927772271b6163731251ff6c75f45b284551f530a0fa4865fd6e0443c5aad566ef0eba396a9d3d41c",
    "signer": "0x247Bd1D668B9808E69f4ad8b7023CC73b4A249ba",
    "userId": "256556644"
  }
}