{
  "manageEntity": {
    "action": "Update",
    "entityId": "353214533",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xd09f49321a368538cb37cf046ae02c9e22c8e72d499e65ead82e923b2ee574ae",
    "signature": "0xa5588ff7e8a9a0037add0b02a69b2237ef53aad3d13b0fc58bbababe48faaec57c4600f11bf1dc9a68fc83b5addcd5cd50677a9950efa56162fe52e4d50afa641b",
    "signer": "0x027B668339330389114813962e0335e3c867e0c5",
    "userId": "353214533"
  }
}