{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "340353",
    "entityType": "User",
    "nonce": "0x7ac8ca20362c8a06bcd0528e5d09ab2f56265a6ab6021a351f042f97678cb954",
    "signature": "0xc2fe62805ead9e0171264d9f69abacccc14c6a02c1fa8e4e71a8187aba9b5586602beaa6ae0a8c14de90463eca6fa106b4eeb2a470148e3fc8360c364e6183431c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}