{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "321401",
    "entityType": "User",
    "nonce": "0x5345fdf9cc10061fa456579e8a568bbbcddda445a67ebbf5e6e6d1eff0180b6a",
    "signature": "0xb09ce36727dd55db965b3d1e87a7fd38c71bfcfc734d788486a495a34964c93f64cd4413f60205817e881817a70b00cd946aec2ae00828eca66c476c7103189e1b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}