{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "137975",
    "entityType": "User",
    "nonce": "0xeca3e3a11be83179fafe2b0cf13b6b1468594193a9d24eadeb86c77bfb78f468",
    "signature": "0xa4497550aab70cabf3d75c959369d6b9d532798a34f340fea1c82d42fc8959bf0ec831078e8b97924ad80c363276eb490ad745f255f398126b2a0b239c677ca81b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}