{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "648",
    "entityType": "User",
    "nonce": "0x8cf7f571940cb1d5d89793e0527181f95f03484166b40f56f514f3e454791361",
    "signature": "0xd646e95c2cc986ab5cf2c3f440e8950b924ce7cbf85977882ca964028792831f01525301547358544bfc62e755fbe5dd7969abd3a4ea54aa736ff4ff342d966c1b",
    "signer": "0x474B8467757bEdBa76afC2394cfCb801C991B143",
    "userId": "815537464"
  }
}