{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "755263",
    "entityType": "User",
    "nonce": "0x07125f4b86a099d7a60d5fa2397018b74157a5699574f4ff9b8a96434a2802be",
    "signature": "0xbaa81e18019fc7f21b3cfa323c14e9722685081bb0ef51567f4bf3750e4a5dae1cc4001203a9ac4bdc9a2ee8af8634d4b95e38575b5fb1e4894baae58ddaa5881c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}