{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "551504560",
    "entityType": "User",
    "nonce": "0x0210dee973149b704124eab9893492d72bb04b8ccc84cb58b0422141018175b5",
    "signature": "0xc19ba29c369f12a598c6ebaebe1edc4878697d2c3c2bad276db27e2ae11011716f1c81ffbb7046a264a513298696972d355543b968ba19e8caadd1cd9ebb859b1b",
    "signer": "0xdF94159720AB889b4D53EB68Be2E4869f38b9eFc",
    "userId": "863573949"
  }
}