{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x29ca21be2d36f13e5fa9db19ef60ffb36124eaf33b8e74f070cf395c93607cf6",
    "signature": "0x3df87328f8cd669f87af7b2c3e7c37ebbf5b2d34282db23f1e76e8e418e153a82d432f24c19111afda77fa958690705ffeec3ccc9f4d5ad8c37be0a2e68e63e21c",
    "signer": "0x9a0fce0dD988cf6e406875F1Dd1cFDE377959EBA",
    "userId": "620773123"
  }
}