post https://fusion.appdome.com/api/v1/build-to-test#privateSign
Available overrides for Private Signing Task:
IOS:
| Key | Name in Appdome | Value | Notes | 
manual_entitlements_matching | 
                                Manual Entitlements Matching | Boolean | 
Android:
| Key | Name in Appdome | Value | Notes | 
signing_sha1_fingerprint | 
                                certificate SHA-1 fingerprint | String | When signing Android apps using Private Signing or Auto-DEV Signing, please add the certificate SHA-1 fingerprint as an override | 
signing_keystore_use_google_signing | 
                                Use Google Play App Signing | Boolean | Send true if you want to use different sha1 fingerprint, when true 'signing_keystore_google_signing_sha1_key' is required. | 
signing_keystore_google_signing_sha1_key | 
                                App Signing Certificate Fingerprint | String | If 'signing_keystore_use_google_signing' is true, attach the string of your sha1 fingerprint. | 
signing_keystore_google_signing_upgrade | 
                                  Google Play Upgrade Signing Key | Boolean | Send true if you upgraded your app signing key for new installs. | 
signing_keystore_google_signing_sha1_key_2nd_cert | 
                                  Upgraded Certificate Fingerprint | String | Your past key signing certificate fingerprint is required to tamper-proof built applications and allow them to run on legacy and new installs. |