{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x1b5dcd0de042c379577a9ba6977c366f8aea6caa708aa2a3a0c331eef9209759",
    "signature": "0x6d4d16112f3d5350ec84b17f4dcdbdd2cba6ee5b71c1fc2d80eb1f5ca0a0b2e7095ea3ab4b844e06a1c5b7d3e3350e75153714d6e6f28e4ad0d013cdebe8f7a01b",
    "signer": "0x515E64f3513F6374A2fe259cFCDE4D36146F7D7E",
    "userId": "266182258"
  }
}