{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "208551",
    "entityType": "User",
    "nonce": "0x2b4fc7f2c8052091ee46f0a7e772de0e8d6aa4b5f7c17f33e12ace490a3054dc",
    "signature": "0x21dc78a138d1715ea0598f1f37bdd2f202deac84d3ecbea6f69d81cf66a38f9c205b4d9ffde7efff131a111fc38bbdc822419727daca3be797a61847f6041dff1c",
    "signer": "0xa4A3F3480fA190Be98764c41851DD9969f3A80a2",
    "userId": "23420474"
  }
}