{
  "manageEntity": {
    "action": "Update",
    "entityId": "883667445",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xcc349373caecfd119741621685a776733df699973927a42c066f652a86394cb5",
    "signature": "0xa760e21f5b45916bfd8592df88bfbc29e7229d047b0c3dfae61544ad075fb0562c184a876fb187d7eb6a2529eee16567b95fa7cbf52a679b93e65eabc380d8741b",
    "signer": "0xa31335946FFa989Bc175B4A200cC3215EB94987A",
    "userId": "883667445"
  }
}