{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "407477745",
    "entityType": "User",
    "nonce": "0x733ddcaba62b4693d46f0a6f3b914a12422e61e3529ecfc2037612b2ea7ec9f0",
    "signature": "0xc52f4fee5d1ec4722a2fdd5ae6ccd1fb16f2ec64d825dbcec2f89a52852008031d2c1a4dec5d2fff451955ad1ba6e81e6bc1d7f0509064ec6bb6a6e4fd9ffe461b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}