{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "409205234",
    "entityType": "User",
    "nonce": "0x3f0c48e67ccdba02e4d419d9cd3c6707dcba8f6049fb8a14ced8b9377d278244",
    "signature": "0x37efab306c09e0e7c156abe7190397f468ddcb48354aaa1fcd9cbada4ac2734e100e60cedb826434fb435aa82b6dbe6e4a745e3f1eabbad89fbc74ef16483bcf1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}