{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "444340",
    "entityType": "User",
    "nonce": "0x7f7810cc917c5d90d229c881059dbee8bcd9cfa9448c8446d00d252209be46f2",
    "signature": "0x6bcbb7e38bf768ede41b9fbd36a407dbdda37abd098293fd310a619f8d07b4341b501f8be88e7e698c46ee7274267ef0cb7850cc262ce50c28a312ebcec556261c",
    "signer": "0xFA54BdDbc2fd0fA514bA36393EF2F5a80Ee9C49b",
    "userId": "428192787"
  }
}