{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "508076300",
    "entityType": "User",
    "nonce": "0x7f51d527e9852e9aac28c0dd5fb06aa68f941c817f4e9d0b65c76f013a4e2304",
    "signature": "0x666368abb0ffe0a37e394c21a59cb5f935e4630c770f7ed15fb53aa3274aa11b50516387db8f63e62dc3d2565c10bbc00c926539c6e77f198175948ee35179e61b",
    "signer": "0xF69D13Bb0FA1ab1CC531D8F0a4b8711857b7b3F1",
    "userId": "730225845"
  }
}