In this case all you have to do is look at the function prototypes in the header file (Fram.h):
This obviously writes a 32-bit unsigned integer type:
void write32(uint16_t memAddr, uint32_t value);
And this obviously writes a float:
void writeFloat(uint16_t memAddr, float value);
If you want to write the entire struct, use:
void write(uint16_t memAddr, uint8_t * obj, uint16_t size);
Of course, there's are corresponding "read" function for each of the "write" functions.