{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "990579",
    "entityType": "User",
    "nonce": "0x4d0e2f0dfc6cb2390beef92c77de8e61cbc9376cac2058b205d0201f88378c64",
    "signature": "0x4a8206b97dfb9151a70e6ceeebba2e9c44010e6d7cd008c50279d744cbbf0e9512360295d8b9124aa48acb2a71628a50a0bfa60463f1f9fcc9b67e9b6081ab701b",
    "signer": "0xa483554f94b9C669B84049D8E78edb9e1d67Bcf5",
    "userId": "339858304"
  }
}