{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "753535412",
    "entityType": "User",
    "nonce": "0x2398454e137796c1c08d6d86cc85af2521b240bb99815c878a657b86a5ec7a5e",
    "signature": "0xdddd496f0b599c73f11d89d489571003a8c7a105ad6ea8fd7abf821d88722bae0efd9d6031288c1e4ca4887d1e6dc95df5e850a7912e7ce552387f1fbd9311801c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}