signature – chee-en-zuh
Written as qiānzì or qianzi
To remember that signature is pronounced chee-en-zuh (qianzi) in Mandarin Chinese, use the following mnemonic:
She put her signature on the document and the cheetah ended up in the zoo (chee-en-zuh).

Tones
1. En (ended) is a 1st tone with — as an accent.
Associate ended, a 1st tone, with a string or tie or tying or knot. See Tones and Mnemonics.

The cheetah ended up tangled in string.
2. Zuh (zoo) is a 4th tone with \ as an accent.
Associate zoo, a 4th tone, with lowering things like trip or slide down. See Tones and Mnemonics.

The zoo was at the bottom of a huge slide.
Remember
En = 1st tone = —
Zuh = 4th tone = \