{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "326709",
    "entityType": "User",
    "nonce": "0x15732937622e260f02f69dd7d996d265505f89fb164a8a31225eb5d7ee25e767",
    "signature": "0x8097dea9fcb28ff6811f7e78da822f8a3477f745857901c942dcb7ae9ab9cac626b3f699cceda2ad09f9e9318a5dc59bd7f4a56c5600dfb3c9026f68af9fe4d31c",
    "signer": "0xa899e54a1aE2f8D645E14e3E1EBF6398971ece5A",
    "userId": "906687997"
  }
}