Can you explain what's wrong with the following curl request?

It always gives 204 response. I have tested the auth token is correct as I am using the same for other requests too.

1. curl -X GET "https://desk.zoho.com/api/v1/contacts/search?limit=1&lastName=abhishek" -H "orgId:57774389" -H "Authorization:Zoho-oauthtoken 1000.*****80c41dab3d25f08591dc76*****.*****1551b58e20edb743c94944*****"