{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1596991",
    "entityType": "User",
    "nonce": "0xec2b5de787ed4dac1b17131c2e7fe8de541cc5e1c70e6437daba54fb6fa2f4ff",
    "signature": "0x15526272e4859307bf66932d07fdbd0851299fabe7b4e8262de05b0505c9afd82a19635b195eda968f23aa4983213ab4e1ee67daeac18e05ba2c70ae952e00e71c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}