{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "904230991",
    "entityType": "User",
    "nonce": "0x7caa14577b7ce7c59752a213dd3c57b70d47f3c2da226b203471872e8e77824f",
    "signature": "0x831906be0121441e14ced6205630ebd95d9f2b4fada4c6dc78a7053b2f676d056415d800bc15411acd7f0b7cec6b5581a78ac1f37cad31b87b21c6ac7325c30a1c",
    "signer": "0xc90725B2af0b60A62c8447FC2385b401197f8b65",
    "userId": "456701734"
  }
}