{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xe76a42540fd3a6db60dad7e4c012035dfad8f6c849768adc273fa5ac1e6a4296",
    "signature": "0xb166081fe0fcae2bc4b6287debd3b9e7abdccf3d3b4de9e1ef23c83c1757a7b32362b1ed6ac168b08f2bb18ca15f7083bc6980de868ff0e5f41b363384273c391c",
    "signer": "0x1665D68c9D8B376a73Ce78AD4CA2021A3FdD7A7B",
    "userId": "39778565"
  }
}