{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "540529323",
    "entityType": "User",
    "nonce": "0x0764854524ca9d0d47ec353d3aac8eccdc0fda0d354e7b13880fc359d66d397b",
    "signature": "0x6b96d5da488f0339e8da387f4cb7b2dfa5268afcedba1fee6afe977f15d627e32518c1b8e3b15543a3191d4072e9e1e9d1de3e68a64888dc28831ee2c2ca85eb1b",
    "signer": "0xa603e9487Ed7C3C62E8acb85f8f32acFf5d6349b",
    "userId": "278135553"
  }
}