{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "681866568",
    "entityType": "User",
    "nonce": "0x059e8294530a95f4c2769b6897ef419c476c3254f764ebf847a54a61370bc7c5",
    "signature": "0x1677064c7f64646e101b5e7887df07396647c7bf38c022684b716f2970449a8c61b10fd64f85544dbccf658648a839be1e9720b01cb1053023373d0aa1d97fa31b",
    "signer": "0x3256Bd2D0B1984E7df4FA525017aD9bA48470760",
    "userId": "51"
  }
}