Initiate a mass payment

POST https://api-sandbox.dwolla.com/mass-payments
Accept: application/vnd.dwolla.v1.hal+json
Content-Type: application/vnd.dwolla.v1.hal+json
Authorization: Bearer pBA9fVDBEyYZCEsLf/wKehyh1RTpzjUj5KzIRfDi0wKTii7DqY
Idempotency-Key: 19051a62-3403-11e6-ac61-9e71128cae77

{
    "_links": {
        "source": {
            "href": "https://api-sandbox.dwolla.com/funding-sources/707177c3-bf15-4e7e-b37c-55c3898d9bf4"
        }
    },
    "achDetails": {
      "source": {
        "addenda": {
          "values": ["ABC123_AddendaValue"]
        }
      }
    },
    "clearing": {
      "source": "next-available"
    },
    "items": [
      {
        "_links": {
            "destination": {
                "href": "https://api-sandbox.dwolla.com/funding-sources/9c7f8d57-cd45-4e7a-bf7a-914dbd6131db"
            }
        },
        "amount": {
            "currency": "USD",
            "value": "1.00"
        },
        "clearing": {
          "destination": "next-available"
        },
        "metadata": {
            "payment1": "payment1"
        },
        "achDetails": {
          "destination": {
            "addenda": {
              "values": ["ZYX987_AddendaValue"]
            }
          }
        },
        "correlationId": "ad6ca82d-59f7-45f0-a8d2-94c2cd4e8841",
        "processingChannel": {
          "destination": "instant"
        }
      },
      {
        "_links": {
            "destination": {
                "href": "https://api-sandbox.dwolla.com/funding-sources/b442c936-1f87-465d-a4e2-a982164b26bd"
            }
        },
        "amount": {
            "currency": "USD",
            "value": "5.00"
        },
        "clearing": {
          "destination": "next-available"
        },
        "metadata": {
            "payment2": "payment2"
        },
        "achDetails": {
          "destination": {
            "addenda": {
              "values": ["ZYX987_AddendaValue"]
              }
            }
        }
      }
    ],
    "metadata": {
        "batch1": "batch1"
    },
    "correlationId": "6d127333-69e9-4c2b-8cae-df850228e130"
}

This response does not have an example.