{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "301508",
    "entityType": "User",
    "nonce": "0xd13141a29da240aa5d2990d35067942cf4fdc8c8e4bd38bb4e978b207ee5d200",
    "signature": "0xade87d6790e337c747d7ea2d85bea1b6dbb36919bf09727080fe8f39bc1010860e0a70afc131f1ffc31b26d6184a7cd26df464265b4450b3fe518b4e879dacf71b",
    "signer": "0x66897996b38D5FBFfa383eD077e429C63B8AD506",
    "userId": "904230991"
  }
}