{
  "manageEntity": {
    "action": "Update",
    "entityId": "5500",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x16cbfde4c6af6041ac9315c432fe951bcb05a9501aca8b539a5cb62df42c9ad7",
    "signature": "0x42fca2e93d22375959ec66db70eb88b578ff8cfa57b6007feba018b4b36d70db6869a70a1b4a33daa10bd67d8e323f3e3600f64a3d8f26f0e52be11e9b87cfbe1c",
    "signer": "0xDC9FB11483106d427BaC29ff4bf0E03f11b4e19E",
    "userId": "5500"
  }
}