{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "107971",
    "entityType": "User",
    "nonce": "0x7756c278e6d3441fefa7363529e50ad2ec6fc31528ed0f6466a8f02e66957b03",
    "signature": "0x30557641cd9c5c5feb28ebcacc5b4f5497b84a97be4204888cded9ea218847f35f43d7c2163211494351f790f566157305762c6726de3d098fb2cd47e522b6b01b",
    "signer": "0x57Ad6E2E3fFc5ABe9b5FE7DC3bF7c07c8cCf9Ccf",
    "userId": "571702334"
  }
}