{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "321896709",
    "entityType": "User",
    "nonce": "0x1a700c3f01f104ee3db90245068f1c2bc80fc39897956288b1bb60e725b9af13",
    "signature": "0xf9168cca9eb1e4550eeb82ab92ce96611678b9830425badfa4565d2c66eefba759c4fe39d4d43175c9dbba21c2c38be99fe0559d6958f6482e3c5b19bdababc51b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}