{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "663465431",
    "entityType": "User",
    "nonce": "0xf19f20d884967dfd52143929fbbc3707e5932a6ea70421922371a23321ae7305",
    "signature": "0x01aad459342c8a9ce919c10061df0969c335e1ab7689cd4cc9971bead7d8edaf5b8f3102ab2020730aedea88419d3688ce96030e87db62e77ee8fec395d6b9651c",
    "signer": "0x038f9CA74f1De4A6D94d94c4C354E1F5B11fd38A",
    "userId": "453233591"
  }
}