{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "446645802",
    "entityType": "User",
    "nonce": "0x15332cce875f25f0fd3b3c3d99619f53aafec9fcb41c027de0650264e91a718e",
    "signature": "0xc1b938679d58c78d2b98402e903dd5e930c04bae5b4cb5c37f26b738e6e170221ea6c42b179ff3306e8b09429ed39942ea957c869d144c03da9e643c491127381c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}