{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "210821",
    "entityType": "User",
    "nonce": "0x429ea6ee6a7666d5e6e557e1a64ffee8150938f06add04dfd57a74e220602ecb",
    "signature": "0x117cd3985c879e3ab12cdd040f209456de1f65a4438b561fbf812545be3ea6d76d92be1b3e1f89dc063897159620602dc0238cd12093421deb2865ca476f314f1b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}