{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xfcdd2a9741b27e25cfd54e2b881080c2e5daccc6e18c05d89bdb8bb054652a99",
    "signature": "0x80a0cbdd461d0c1b5d7273cfc0c40eecc1a641d6d4994fae1a7a654a91b1ef1746037ebc2f6d9fadf8ce6b6428b45c34d6e0b02fc7abfc009b608371113a78a01c",
    "signer": "0x542f3cEd0BCFe2401a4326B046A530b176Eeb51e",
    "userId": "553120706"
  }
}