{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "689026715",
    "entityType": "User",
    "nonce": "0x6ff690b5c7bd1a22ed8ad1652735a33b205acdef15902d3d8d2736829af67cab",
    "signature": "0x0237f502a8441d9e479e1dbb825d82de353948f7d632b010d2dad493e0e9d1bb7b35203dea7ae2186d3efb3d8c8c772c0ab31d2fec2ab832e33845c35e8322801c",
    "signer": "0x9a5c768De106BE48C39290B55c20D8C5D6A7f6bA",
    "userId": "539482786"
  }
}