{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "540529323",
    "entityType": "User",
    "nonce": "0xf53bab55d7a0f4559a4aca42ffdbe83023400c171eaff35bda6769a0b3b38ccf",
    "signature": "0x891fcab9197312da302ee8ad301be3413cc2af08b0d99354127f4cf5049f32c81dfc31a67e5bead5d89441f3a881aa8a9e6e4c147cdd9e285389a718fe10ee9f1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}