{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "21640",
    "entityType": "User",
    "nonce": "0x2640196d9be9461fa87cfece2d08444455809474786c26005cb1666d1f8434f9",
    "signature": "0xcceaf1a0e6457cc92ada40da15f2c09bd03f596005afab9648dc58705e612d254821023876a76f20cc1e82f1a052ac01ce4d2d8fb1166f9a87fd8ca2d3f12e031c",
    "signer": "0xb8909c41963586dbBe3EbbAB4FC8F1f8E6970Ce2",
    "userId": "435332232"
  }
}