{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "307",
    "entityType": "User",
    "nonce": "0xedd2733cc52aeaf8e255f0511d4ebacfca76c09c724558c7de0f25043be0ce38",
    "signature": "0xf0891bd8b1626bdeb24018bc51fc0ac8f4b94c3b3c5f7042dd26d76539f914912e6e29c98e6b1ecdc2713eb42d03a645ff436086cfdb4c8620a4c79b8951f8881b",
    "signer": "0x546643B8F8164fB6dC42c93F65D31C17676Cd995",
    "userId": "305541868"
  }
}