{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xfd515e7ec97b76a99353572963e8ae686283d3855b9b2d3f5160d87d41ea8c20",
    "signature": "0x0ec1f554cdf630b606ad57499517528fb60cb7d3c45dacf4bc4d79b5d6959b0540d7912c2331b8bc1bfdc66005bba0fbf3407af90fb228b17c07badeb85a858c1c",
    "signer": "0xDb76663ADEf809efE2D6914c99E1bf0B5e252F7a",
    "userId": "169901003"
  }
}