POST /messaging/v1/email/definitions/ HTTP/1.1 Host: mcr8gksj8g2cstct-75jyw5fg-x0.rest.marketingcloudapis.com Content-Type: application/json Authorization: Bearer eyJhbGciOiJIUzI1NiIsImtpZCI6IjEiLCJ2ZXIiOiIxIiwidHlwIjoiSldUIn0.eyJhY2Nlc3NfdG9rZW4iOiI0TDlWVXZkcWo0ZUZOWGNKams4d21RRkQiLCJjbGllbnRfaWQiOiIyajliMmN3MG40bXU3ejFhcXg3enRnNDMiLCJlaWQiOjEwNjI2MzEsInN0YWNrX2tleSI6IlM0IiwicGxhdGZvcm1fdmVyc2lvbiI6MiwiY2xpZW50X3R5cGUiOiJTZXJ2ZXJUb1NlcnZlciJ9.gdEVrIFXf_Liz-BcUevS8Io3zzV1h534tkbX-8pLG5c.jTX3UB8XqgN0NjtUMt3sE3Ml5IRWpDlCNq81xfzCGp1jou1eMoGMQD8_BmVUYbWG7iHCDpxwKej8tRlw4eQGshye8ZDwjuDymaNFF57T7tX5r9faAAsA8ngFYn1nG15bOFNItm8llWBBz3X4KxJJKMZEdzINLLIRnf4Y6itjin1E6d5Kijhl1Bl User-Agent: PostmanRuntime/7.20.1 Accept: */* Cache-Control: no-cache Postman-Token: 8f8ba77e-ab7e-4189-9b2d-4c78e6dbade6,d61ab5bb-d49f-4abe-b7dc-4c90e39d62de Host: mcr8gksj8g2cstct-75jyw5fg-x0.rest.marketingcloudapis.com Accept-Encoding: gzip, deflate Content-Length: 473 Connection: keep-alive cache-control: no-cache { "definitionKey": "Signature", "status": "Active", "name": "Ranjan_signature", "description": "Ranjan_signature", "classification": "Default Transactional", "content": { "customerKey": "80d9c4eb-b10c-4d18-81bc-2b67e0dd716f" }, "subscriptions": { "list": "All Subscribers - 117570", "dataExtension": "Kapil_Test_25384", "autoAddSubscriber": true, "updateSubscriber": true }, "options": { "trackLinks": true } }