{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "309421",
    "entityType": "User",
    "nonce": "0xbd6de12ef3a654231ec53540741aaf908e337d5e4dda61a626d36d0e10d45056",
    "signature": "0xf3bd19b1dae1acb8f28df993ef58fcb1526055425a1eed6cb3e568361642a9310eb23ce8dbe511613b07d3f70f5ae6cb3e11b31dd061187c1ccf000130c6a2de1c",
    "signer": "0x2D566E1DaC6fc148a694abe846B32e39B6584aa5",
    "userId": "890889753"
  }
}