{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "573790218",
    "entityType": "User",
    "nonce": "0x35f4c00e470808eeb55bba59209804434fdeb67448e49d4e6e1ea497f3fa9a5f",
    "signature": "0xa9c540029e928b8e86926ffad0e9f8800aff298adcf1eb6efbef84726226db28298f61b17312a6de86f9fad3262cc1c96f8dc090fba417b85f7cf1c761a8b1ed1b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}