{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "875378857",
    "entityType": "User",
    "nonce": "0xb940daf28ac4c4d424662378730dba9cbcdf8ff37709aa0a03f4d7b1153c0725",
    "signature": "0xb9ea098ddc63f0707e0246d315b7545d6e29b2237cd623e0e3e4dfb7bec2a6d446c11adcdf912d068350115ce3ece5b458f4394347b40465228375bb1d38a0e21b",
    "signer": "0x474B8467757bEdBa76afC2394cfCb801C991B143",
    "userId": "815537464"
  }
}