{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "50672",
    "entityType": "User",
    "nonce": "0xf3443b8d24a523d27b717b70d0c45ea082b3bde6d3bdb638549828841d8e9191",
    "signature": "0x2bf7e568c467656d442ea01630593168c4c6fe19e77c8d2481a56d3f9120def34d55ea4668ac7c4fa03f508c21aad7fc1d74acb98323f2d4324dc70148ad88c01b",
    "signer": "0x4950A7c498b6c214e83B79502162b7f248f9e6ed",
    "userId": "499895630"
  }
}