{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "339826419",
    "entityType": "User",
    "nonce": "0xf34ce03d392d5b8633bf8b3478e8d535d3a67bdd1fddcf8829b0b1180f7848ef",
    "signature": "0xe68cedf5dc37eaba8fdc1644e70645c4b4552c2313e3821a56f6dcc111d1e0184acba03177a3929c05ca1174ebb41c7cb6feda93077e87cb30f138ad43ae14c21c",
    "signer": "0x20a821B898F6Cb6BB0E5FB2460eD4225B40Bd68D",
    "userId": "198400104"
  }
}