{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "646",
    "entityType": "User",
    "nonce": "0xfc3b48fb625b7fabcf7a5632ddcd756df8b1f463523b2435feae12c8803b44eb",
    "signature": "0x91dd28021ecc2d0c9c6c11835f7eb0d93bc59092cfecdda80345ef31f8537ebe69573c09b61e2d497c8c3341e452432933121b97800712d20f3b56dd0263508f1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}