{
  "manageEntity": {
    "action": "Update",
    "entityId": "774858683",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x51dcb4588dfb28fb2ea312024455bfbcdeb0f8d4d6da2f1e707cf0439abaca5a",
    "signature": "0xab155670f2b66560afbf70e3e0393320654d9c0ed6312b6c630868264ebac30e6b7dd3d936c79543dfad64446739a10826eba11949f140c94bd5d2fc7da1f9141b",
    "signer": "0xff3C1dd8FF55065004dC3f4c1E8D6528fA839c4b",
    "userId": "774858683"
  }
}