{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "486490947",
    "entityType": "User",
    "nonce": "0xd3fbac1f5130e65ae252f3ae0d4368197437d9131890d19c7ebe5b5198ef5733",
    "signature": "0xe6ea321877da5fbddf7c3c16fb10261deec5f9420bdc9869e97836317e51e6703a9271c360ebd11707f73b72bf8e84fbb27b8e8dee4bdedcbace66f35a9b21b51c",
    "signer": "0xFe4E972E3ec8D8d619816F5644f74CB5bA1B01b1",
    "userId": "219239808"
  }
}