{
  "manageEntity": {
    "action": "Update",
    "entityId": "537522818",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xf881bcd17d90aecce311ae24993808b344cbb95fdffa12ab41d2b1de849dc081",
    "signature": "0xca3e819fbea1db31ad4309c4b3161f0b26c2ba7ef3f5e1c8ec3026020c7376ba7fadcd81af5c67b9f9244d4a5e4b51c3a441b0efd4da2d535bc40b34a0451dbe1b",
    "signer": "0x4489275EDE3B5561263a21082691c922E2c3d2f3",
    "userId": "537522818"
  }
}