{
  "manageEntity": {
    "action": "Update",
    "entityId": "5500",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xf511fa8afc91ae7bfb8f2da5f658bad920eb51b49039a2fc17b859b2e675fb5a",
    "signature": "0x429c7e13870c7dbdaf11c71d4355e8f793c334efbf327038c3a7d4ed3823f58b1a2db9b82d5d1a1784824b046e7fcbec0fce38ff7f1d5d886c5f0d90aa8efc371c",
    "signer": "0xDC9FB11483106d427BaC29ff4bf0E03f11b4e19E",
    "userId": "5500"
  }
}