StakedServiceProviderBond (address , address , uint256 , uint256 )
[topic 0]:0x4cc243ed0ad904bb13fd3b0c99807f2f5ce80430c6c2f17cd8f5cb402beed8d6
[topic 3]:0x0000000000000000000000000000000000000000000000000000000000000000
0x00000000000000000000000000000000000000000000000000000000000001f4