{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "599112855",
    "entityType": "User",
    "nonce": "0x1496153c495c6d40f374676f4440d4bc9139fcc1ac9173a8bcc40e91fedc0cb1",
    "signature": "0xd64f9243c24cc71856b4578d22b068ea14b8413472020b0bc6c5d85dbc0763f16f426af923c60b51ab140170f6112a8a010819e024714dc6d380fbf04aa5bc491c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}