{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xfc299be0b310fc39270e48a7b10a3c069a740da176efbff95a3d5b07ae46c90e",
    "signature": "0x7a3fcdbf4f831bfb820f1384a523239625ef3fc130ef4a8b49da043db0926e1e7c209196e41eb55f7592dfd625855c90c421d6d45cd4838a88ea8ab5670eee661c",
    "signer": "0x5a295e904D719f9269D210eC54112486177D5b9D",
    "userId": "451096874"
  }
}