{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "404",
    "entityType": "User",
    "nonce": "0x4b974a2bcc2f97e2a3916a36254277c370595b0b552bd1780c7849ee48f39c3a",
    "signature": "0xb3598892a66208b79f1b1336b6e9e62953ab31df20cfb18e3b01e366b8119b6b6c1899d1bdc7841ccdc7de7b866f71411aeca26a12c4a33fae9bba316b1ea5dd1b",
    "signer": "0x3B446829846E4Dff44d7a596d5B5E2e7F6f2A2F9",
    "userId": "784506004"
  }
}