Create a Fixed Note
This endpoint is used to create a new fixed note investment for a customer
POST/fixed-notes
| account_idstringrequired | Unique identifier of user account | 
| asset_codestringrequired | Fixed Note asset code | 
| tenor_in_monthsstringrequired | The duration of the Fixed Note plan in months | 
| amount_rangestringrequired | Options are ['10M-100M', '101M-500M', '501M-1B', '1B+', '100K-200K', '201K-500K', '501K+'] | 
| auto_reinveststringoptional | Indicates if this plan should automatically rollover |