{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xfe0c4008b0dd451913cd74afdc1d1ca51986d8b6df64109c1d7242de9f515378",
    "signature": "0xb5c60aa0fc603a06f503c0df705a52e5b58a53ef854d20e2546dab2f69b55d5e6de5a2c5637d8f52441750306c14717cb7e7c0a2ff698bc0d3b76c1b8755d9f81b",
    "signer": "0xf7304A18569B456acF862f898DBb2B9cEDdf3edC",
    "userId": "37114300"
  }
}