{
  "manageEntity": {
    "action": "Update",
    "entityId": "5500",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xfca963196ded991e13fb6762caaf7d3d401d7c9a853a0b3c76f0750e762c72cb",
    "signature": "0xf5005100eda3f9502a7fb26ef36a7eb03acbebd31101a4d67c8f5516b591bb6b6e8c12f6bf3dfaf170b0f9066ad55f73f042c343d56100f5f7e25dd9cfedcada1c",
    "signer": "0xDC9FB11483106d427BaC29ff4bf0E03f11b4e19E",
    "userId": "5500"
  }
}