{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "570740739",
    "entityType": "User",
    "nonce": "0xf2f5578698e58ca7f740cd2998defff01dbe0042f23c48719567384cf71c4e6e",
    "signature": "0x1c823d918da8791ebc38077d7de71c0ea798cb2c44dd8d4d63b5db6ecea0ffc038cc76b61283f8a76385db5c156cf114b88a1d44e57e106987d8b42d6a9a91b71b",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}