{
  "manageEntity": {
    "action": "Update",
    "entityId": "508961668",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x6391fa2a286074ae18ededf30eb14ab5e98abc2df4996d1bd332b5ce60a2c49d",
    "signature": "0xa52559028e40c939fedc9673599290fec03caddac7c09a4447fd6c39ca001a8c637c0eb78e24b1b0573f93f2cfae927270cd69e182e7cc274ab24bb53da9061d1b",
    "signer": "0x9CA3eED2A5a13144734d45a266bf6D4Cb2873344",
    "userId": "508961668"
  }
}