{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "12615893",
    "entityType": "User",
    "nonce": "0x6589bf28007bde8d0bfe0d3e343db6d87e932c094a661c13c7ea01670b4acdbe",
    "signature": "0xacd2c709ff19c4b85b4712aa8e3a06a00608e1f52615096bfa5cae3c9246d59c24a0192076ec0887dbcb0e575ef29ad3c2e5be61f0c8d21b2f09c799db44a6741b",
    "signer": "0x45C74e4f36E4e5064C5321eeED3748fD52B04eA8",
    "userId": "133970929"
  }
}