{
  "manageEntity": {
    "action": "Update",
    "entityId": "5500",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x19c030e824b9d01a0a75d3d06e56880cfe37775b61ff9dc55d7edb05a18b05b9",
    "signature": "0x5f550b109738b15e8e3487c8125411f93711510b86d20909dc47d54edf4522dc76af559d0b2146601bbe084e5efadafc618e9e1bf3ef8fef3e7ff61c8bb2d0f01c",
    "signer": "0xDC9FB11483106d427BaC29ff4bf0E03f11b4e19E",
    "userId": "5500"
  }
}