{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "390077",
    "entityType": "User",
    "nonce": "0x76c9294cae0f59e1397eac130fa24214f1cf962674e929a73fbc54012546e5ed",
    "signature": "0x879abb10943ed5f8592b55885044bca54678a5fb008c9b5bd431073e40ad310d7f406a332da7c9f41d3f8293154c1a57094054386cea77b65534804fea81d2ad1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}