{
  "manageEntity": {
    "action": "Update",
    "entityId": "5500",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xcaf5533cdb6b6bf3dd7186ad26955164fc29b358c548c08d8172863664c36f6d",
    "signature": "0xa90837622f0e89e6ebcc55ac105cfdf8841d7131148efadaee2f9de83567ce940a2ad5752bfce2e6637e829bff31cedfb29dafa4575f632ddbdc0411f3f630881c",
    "signer": "0xDC9FB11483106d427BaC29ff4bf0E03f11b4e19E",
    "userId": "5500"
  }
}