Paymentable:
      properties:
        id:
          description: 'The paymentable hashed id'
          type: string
          example: AS3df3A
        invoice_id:
          description: 'The invoice hashed id'
          type: string
          example: AS3df3A
        credit_id:
          description: 'The credit hashed id'
          type: string
          example: AS3df3A
        refunded:
          description: 'The amount that has been refunded for this payment'
          type: number
          format: float
          example: '10.00'
        amount:
          description: 'The amount that has been applied to the payment'
          type: number
          format: float
          example: '10.00'
        updated_at:
          description: Timestamp
          type: number
          format: integer
          example: '1434342123'
        created_at:
          description: Timestamp
          type: number
          format: integer
          example: '1434342123'
      type: object