{
  "manageEntity": {
    "action": "Update",
    "entityId": "370091516",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xb40c24b5875eaa203fa7de9908f56b762d60ba15baf3bff2b15774420b113e78",
    "signature": "0x720db5aeee469388a2a144ca127b3b91884f8e04e7fdc63e8e82a0d9ad5a9ca037210c00739b75552ae3badcd073a9067afbbe3ffc92c4c7930653d226bf84531c",
    "signer": "0x15B9643abE09bd37C52a5BD1dCF938B05b06cBFB",
    "userId": "370091516"
  }
}