{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1421599",
    "entityType": "User",
    "nonce": "0x335c64001972d4e8f973ef3273d7abad9f2410f4f6299daf0bba0d98dbc7b993",
    "signature": "0x3d90c5100635b689ad638e7658b28df03a60535b43401f78c032b9d4dd8bd8c5655803ff5161414faef03579b57aa216a571a3a9b0ef2039c56fb6b392c2ee551c",
    "signer": "0xB37E6e788b6A39dCDcB53bf8D70077f76F5F5C26",
    "userId": "895209133"
  }
}