{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "17913",
    "entityType": "User",
    "nonce": "0x831093fd1940994d685ae6326d63a267f6c4737692bfdf4f3c3b6a7d6aaa67bd",
    "signature": "0x8d44dd53f4a155fef5c1af0d99288c6aeb36b3a82baf2ecd198d6f3e60e140d074c3ac2e9eccf393a40fec2b122cb268373161a1d9ac78e63aafd91ab07bccc41b",
    "signer": "0x12EaF77464824447aA995e75Dd707B3e5246be9C",
    "userId": "409175645"
  }
}