{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1345",
    "entityType": "User",
    "nonce": "0x2054ae2fc15794aa69889fae866f0afaa60a8caa3baf44cd98b28a4d2818932a",
    "signature": "0x932a4b17f48c85091713fcb68ea19e854daec3a6c7535ad8ba8823e2c5fbe9f64f5d09b185d2ca923f6bf054ef3b58486cea45c853d42a053c6d56db751d26261b",
    "signer": "0x2D566E1DaC6fc148a694abe846B32e39B6584aa5",
    "userId": "890889753"
  }
}