{
  "manageEntity": {
    "action": "Update",
    "entityId": "251301438",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x12f3e06cd712f6463c6ee14a1fc4d7a21023ee1ef82e7263a15e4a1af79f1f5f",
    "signature": "0x6d039d8b6158f6df7b4f46ebd3153235aab8ce2a7b73e4c373bebe25d32d554107785ed32720411adca933045b0c12f205b2e6946a135576133c16e7680cb6ee1b",
    "signer": "0x8C8cd53F457a94deD3998A6853eb774C2297998D",
    "userId": "251301438"
  }
}