{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "722764767",
    "entityType": "User",
    "nonce": "0x7696c9a92d438d5ee34353ba4923c1cc66b00275df66076ba295c1cf6daa1356",
    "signature": "0x600c1a1c91e8ece8a8b00280f53a332caf8b7c82fb07be013bf3dc87d6d850ca35bfc1ba4504cdc9799ab3e9bc8de05ca0e805a7f8b33c378c4af0e84c440adc1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}