{
  "manageEntity": {
    "action": "Update",
    "entityId": "438327537",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x990c4a3554899ae79da15a06f84511b29446d030ec5a736ae4d491467137afbd",
    "signature": "0xe9e1ed77d10357818a6b1b7c1da7d28fbc64ee9cad14c19c2770ab9d9aa7ec17402169ee14f4b8cccb868e85229baf904ba701d49b7e73956de84f596d8983741c",
    "signer": "0x0326cEeBC8D8084bb9Bb3d2cB26e0F1D79c03903",
    "userId": "438327537"
  }
}