{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "5161",
    "entityType": "User",
    "nonce": "0xc5f56ec89e3dd3bb58ecfc5f03a45ad4903b58b119bd284c1aa3d8d22a8524d9",
    "signature": "0x9869df107f6744f8afaa4595d4d76f19b3888b0ee509a2e24151dbcb3777cdb35d5d454a6ed73ae0c56c496b11529cdee8292315e79b245388af7ca9e84e57e51b",
    "signer": "0xb8Bf68e2681FA1A8a8ce9c78070BF9644e947378",
    "userId": "12890"
  }
}