{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xa4e519c8ca91792fcf41f6b8626d0b2d7ac69be68f8b6e09190313c9d41656fd",
    "signature": "0x3d99048c30b7a71b60621bd0905649adc1a912641942c87f7bde8913f9f8f8700cc8051e8191815d25a6a3ae76259cfa0db1dbf8213ed0a85278731697506c261c",
    "signer": "0x584E14C286Fbe3d7d725fEDb4a87e9336366de1B",
    "userId": "505088404"
  }
}