{
  "manageEntity": {
    "action": "Update",
    "entityId": "51270411",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaieray5rn7bfch4xxuwqy4oabhanyzfikaoue4cleoxqpcrnbnx7hrkga\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":87904}]}}}",
    "nonce": "0xc666d28f97ddafeff05aaa92d7b8498e09d81a62681f5a0bccec55ee5f6b6f39",
    "signature": "0x7722ec56fa2a9d0ed8d6747fbc1a2bde5fb1abf2e6a51b43ac81a24ccadc7b9e0c910eab0bf8793281e4dc461b5b7e60c3e581908acdc513d61d3094b3e2fb7c1c",
    "signer": "0x1F5b327b06F23985a2eB7AcDEE087c4CE3F79860",
    "userId": "51270411"
  }
}