{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0x4616d2ca6bd52b725f1e0bab790d35fb139abfb56a058d291f01e86e2c67cb5c",
    "signature": "0xf991b2d62e31df63d983e20f71663589e8b06387e2df50e7479f74b01fe74e5109fa81ee9d6e3661cba348757aa0b01028078aa5482cae1ac93c2a5c0e6cc93f1c",
    "signer": "0x7EB9BADbB225C61Feb02f1C6E9FDf3Ee544E8b2e",
    "userId": "741012897"
  }
}