{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x2aa06dbef9a3d1ef9ebe531667e63c2375612f4ae0c5d8cef131d76ec5d2160f",
    "signature": "0x7959b5277f15f8f1170a7e6de94d8f78e538f7bdf13d383af0629a2d0d0d89fe2171336d80e0d7d306be67fedf301894f9c620062c1b79a4cf8d939adb8cc5051b",
    "signer": "0x9717Cec0d26c8A36Da08D838f174B2f2d462CBdd",
    "userId": "512398030"
  }
}