{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "321501",
    "entityType": "User",
    "nonce": "0xd66a67cdd5c01ea155268ca27c86f07086c74da53747fd95b471a1c7b2b0a22c",
    "signature": "0x1ff372d42ea9aae4b5d13d5c384e224a21a6b20e4b28a7d88acaae94ddfd107d7241004ccb07ec18224c6e797aa90175b56ef8f0d8b12a6e08e6b397cca6c77d1b",
    "signer": "0xB8bF557DC997cD9e10AF5CcDddf0D851f201Cd90",
    "userId": "806523887"
  }
}