{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "974232226",
    "entityType": "User",
    "nonce": "0x0f7c81b92eeaa3462db740790c2b5e2e90241dac9162d7e5f083c944e6d0e03a",
    "signature": "0x137235e285bc41698ffb1563d977aad432aaa3c61513d08e4549f751ccec06d10aca2485448bcd1518a541c4c6f649e631a2d19d8a44d6d6fe2443d3021965351c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}