{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "121290",
    "entityType": "User",
    "nonce": "0x87d18288820f768aa187a427c63cea26a880983f64ba04f23766360833dd502b",
    "signature": "0xb2646b5c9e762fb76fb095bdf353fea2f8599a8e742e357c25705788e57cf129678b40241570aca3f939208ee21a52f10d55c32e191bcad1dffc5fcab4244b121b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}