{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x52badc3ec77d3e52f4b5a01d9009c604545c4ca93093837601d7d77c255f250c",
    "signature": "0x8e3c8aeee54fd02061cd7adf2978585ee582d643751553b71887a97d7b62ad4e5174a7bdca2a12773f1185f07eac4871a070b7c8045b055f5f821a609b7318411c",
    "signer": "0xBB09642830EfAF0bC97708D705A85C90241198A9",
    "userId": "757246211"
  }
}