{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "540529323",
    "entityType": "User",
    "nonce": "0x5c09adfe02afc3930a68eefc848c6b714ea8e9345bb0047d29b6197e7818eca7",
    "signature": "0xd3b2715ee9e8924acddf2bc21fb3c1ca964d653eaa2d1e1d6902904dcf2299a1118a8d8bdf7dac61b84f9d67eda943c4259c74d897be45214bf7db46ec2c01171c",
    "signer": "0xa603e9487Ed7C3C62E8acb85f8f32acFf5d6349b",
    "userId": "278135553"
  }
}