{
  "manageEntity": {
    "action": "Update",
    "entityId": "374027008",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x5440de9ad0a784ebca4dac092147f7adb22194888ab78b07a49a6654c6fff7f0",
    "signature": "0x45b1bd62cb0df9a3688e9af3d3b65610e03bc559521cb79d52eb58c690955bb770378bb6b0223a21c337461c02cb66cfa5b64ea600c58a86c41bc3637fcf9ed51b",
    "signer": "0x5Bf16e390e9979d998f5DCdF509Abc7E786E74bd",
    "userId": "374027008"
  }
}