{
  "manageEntity": {
    "action": "Update",
    "entityId": "299610913",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xd893dfc9927c51516c956608015068f37d3bebd1e7040ef1c30130625d11e841",
    "signature": "0x5fd34663ae7a8558f6247a07d0922368d75b86945c82aff0d6e399f45a77ccfb539916b03778cf17aac2b527d34108f39ef7e1766dbb820258c870b15cec0f881c",
    "signer": "0xd38BD227844B6BD0BA19a5de6116A8721cf6777d",
    "userId": "299610913"
  }
}