{
  "manageEntity": {
    "action": "Update",
    "entityId": "977332529",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xc9b68aa94f8f2033fb6350eaf0320e55fd00b4eb1b5afd80dfba3f1f01599559",
    "signature": "0x2468c5621207ce0e2cd9bf03b90d6044eb70c63396a20c6071d544469cf9c93e52936d59a791fa601a2f5467b5eefdfc7e744a5fdc4105ae1efb56706251532d1c",
    "signer": "0x77a1439B3FdE340C82aF1Da36939e1fb9d7D640b",
    "userId": "977332529"
  }
}