{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "737416",
    "entityType": "User",
    "nonce": "0xcbd1e6de104f902658e993cc071f7fe28ab424fc46aa36ff7843f6de9f97e3fa",
    "signature": "0xe51b874f8412e488eea396e8e2d64c6aff2db4bbaf732d398db991f79780bfa932348b31ab5b2872c87e9a7f7d9314525d66ff04f2b28e32388ff058c9b1def71b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}