{
  "manageEntity": {
    "action": "Update",
    "entityId": "502388335",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x53cc5127a8be93e8efe2ad52815d82c9d4bfcda9159f80baa535669dbdf96d33",
    "signature": "0xcd0de4c7282a5e8a833e046b777363903f03cae3a3ef3853f8f1bab7792d7aa76003e192e18c69c46966a19063ef007a8ae0f6d04cf3a267e675be591d88913c1c",
    "signer": "0x7FCffbc9FB7516A6453F59c5b9918Ea8A7EB33eb",
    "userId": "502388335"
  }
}