{
  "manageEntity": {
    "action": "Update",
    "entityId": "391391717",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xdb916978c7bbf9527f99bacac3106d20ea21f92ce572bef2ee5251872cb29f4c",
    "signature": "0xbd51e7aa9dd162803ab5049d6f2b25d1804c62552f7a6b6589c1e54a5d11643125eacfbc46b1a7b19177801db416e991e0429e0631f37840808cb3ffa089c6811c",
    "signer": "0x3A99Acb4Df313E2773E801a840bc04ce72332909",
    "userId": "391391717"
  }
}