{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "990052786",
    "entityType": "User",
    "nonce": "0x2527dcf8db4bc3c05a17da54494dc2478313055b80317042fde969abb85bee9b",
    "signature": "0x5465ef47fdf6e356d76a09719e78aea37a6cd856d7de1b1f74c46cdc455fafb90c30dfbae89b0c1a3f639cbacb1e65f2375cfdac6145da30bfbae0f2a990d2691c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}