{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xa4fe29275e54c28c79b5418bb78a7740627548f3fa93cc313a93e52fcf36493c",
    "signature": "0x7f3d346a533dae83a27b93163808a8218cc3bead1db8ce357e2852522095547046acfa4716bc4c5cab6ed14d0c98561608628ef53ee6689fb99a034fbf349fcb1c",
    "signer": "0x50C788e98653bf302c8bABD4990de951be4A7579",
    "userId": "603536841"
  }
}