{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "203753098",
    "entityType": "User",
    "nonce": "0x625c87209503f3174aa1c2f6ab2ed241ea1987d2d81dc3456279ca2ff1b3588b",
    "signature": "0xbb3a8dbfca0b571c64207b4dd0c00217fc73ac9df4bfd848be101b9653ad04a70076194cd1c1665a14a2708547954800433c02aee12f8b694724b4c332800f881b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}