/api/v2/admin/txrequests/signatureshares/bulkAllows a BitGo admin to upload signature shares for up to 50 (txRequestId, transactionIdx) pairs in a single call. The wallet and enterprise for each submission are resolved from the txRequestId — there is no walletId path param.
Returns HTTP 200 with { success, failed } even when some items fail. The caller must
inspect failed[] — a 200 response does not guarantee all items succeeded. HTTP 400 is
only returned for top-level malformed requests, batches exceeding the 50-item cap, or
duplicate (txRequestId, transactionIdx) pairs.
submissions array[object] required >= 1 items<= 50 itemstxRequestId string required transactionIdx number required signatureShares array[object] required signerShare string signerGpgPublicKey string success array[object] required txRequestId string required transactionIdx number required signatureShares array[object] required txRequestState string required transactionState string required failed array[object] required txRequestId string required transactionIdx number required error string required name string context object required error string required requestId string required name string context object required error string required requestId string required name string context object required error string required requestId string required