{
  "manageEntity": {
    "action": "Update",
    "entityId": "12399170",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x88ec7632ab283d1cbdbd0509d2b683c360144c474b47e080dd6445d4f33238c6",
    "signature": "0x45825fd1b0bf9dd670218f8944e9362abe556ac5f540856cd1c95f4ccb27bbf4482450cd4fbc15f98121960744b7a38a07ef93f1fbee3c0cfff79b9fadfc93c21c",
    "signer": "0xB877165EaA62d1cE6428fcf6B093E4E531e03798",
    "userId": "12399170"
  }
}