{
  "manageEntity": {
    "action": "Update",
    "entityId": "520723855",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x4fb6a1ec4846ddd6d44ebf9f4cfdb8a7dc3ad960298a288ac91e6aa8bf3dc240",
    "signature": "0xa4bdb4670e787fbc72d3068c6472edb765d771fb4c9aaf221a752c52b210af9a63b13ff7e590159de073c8d20492247e79f144a1c6e37c9575c666550c1d54271c",
    "signer": "0x369dD45047998ccCC8699316C910B0D73eDf8A6D",
    "userId": "520723855"
  }
}