{
  "manageEntity": {
    "action": "Update",
    "entityId": "12456385",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x441a8ef45407870ceb46fdf23141e178210ccdc48bead1003cbb211ea1342156",
    "signature": "0x10652dd0339b22dabf9317a4ae0eba613a4357f773a464bc0f7d2029d483aade1454a37afced3f2fbc18bc835fbd0dabfa9019cacce6464a595f80dafdca46c21b",
    "signer": "0xD88906d1FB1bDc2f219b6b63EFA064C13946Ee5D",
    "userId": "12456385"
  }
}