{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "300437",
    "entityType": "User",
    "nonce": "0xe9bc2eca55e60037d9e1285abea410c34cb1a49f382683b562113b066b78ca59",
    "signature": "0x833e4cfb7f8ea987af9666334e4007d0608df5bd06e340cdc7273b6173c99f4f15e932d2495c418defdb914df8d49a9e8347f4ce7a3fe36abeea3de4a87994021c",
    "signer": "0xa603e9487Ed7C3C62E8acb85f8f32acFf5d6349b",
    "userId": "278135553"
  }
}