{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x8312c3efe6eabdf3de72f1f24111bcfda0d3f3fd44f68e298548e5b957368581",
    "signature": "0x9b919873f99c60bcecf0e99b94cb2226f85a5f39cea72152e0e692d9823e9a2f0d9a4f8d6dd6f195fb7a265d36c145d73ded1e2ad11c1d7b372076b62d8d48801c",
    "signer": "0xe8BAaf9d67869BFe993951C60524b67BC331bac9",
    "userId": "75683930"
  }
}