{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "863774823",
    "entityType": "User",
    "nonce": "0x7b4ef4fb93df1c5f7a93bdce48f1cc20032f29cc0fd5ffde378ef208c7b8b701",
    "signature": "0x548008b7b74c26f481fe39b739becf7c2e45200894e01b4c079ecf985135bf0d2fb028cfca515b5fda452a91965cdd43cb9160046375f0a261a68ca90f619c271c",
    "signer": "0x7FCffbc9FB7516A6453F59c5b9918Ea8A7EB33eb",
    "userId": "502388335"
  }
}