{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "670307808",
    "entityType": "User",
    "nonce": "0x6d2c6789c058f146d75d49b01853c608160734d87b19ee570072a3c6037fab39",
    "signature": "0x40069e94677df1c92111f156dd6c8744c51058139a3151b7353fe0e001b91b9d0dbc35fb3a881ff8b8670f3cd1059449bbbffe016a03496c5f2f29e2fd34e1491b",
    "signer": "0x7cb443E1D882339Ce2Db89944ef44929E8E2F578",
    "userId": "343301"
  }
}