{
  "manageEntity": {
    "action": "Update",
    "entityId": "304470790",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x43e8dbd13e3bfb88b21acea7c109feb9629dd38898558e61744cf2ca1e97267e",
    "signature": "0xa780b44d25a0958b7f18e0141a2de9d4b3632eacad14baf07f5ea0f1191fef951523c3ef8bdf062563a66ebe92baa09db4392ceda90113770900ae149ef9800c1b",
    "signer": "0x4B570b593F6485BC7F1ffD7095D30b966f32d3c3",
    "userId": "304470790"
  }
}