{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x7766a6d5a828e5530ee7b80855cc2b6fa30ea881df47477c0829ac735e1738e1",
    "signature": "0x657319f36225f1efdc6bbc1ee9e8d6ee4f72e7199870e2f98e2e2f742c829c1a162e47e37ab1b68e2f260790bb71b5cd4b6192ae3be9bd0a486884bdaa96d07d1b",
    "signer": "0xb55E578ee2830B0b9fD8F71b4AD5CC9a39F5F6b6",
    "userId": "146167259"
  }
}