{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "677195430",
    "entityType": "User",
    "nonce": "0xa21f4601b19ac64f07b8af05444a5888e546e2d880622a8402a3d4060705d0b9",
    "signature": "0xdf82fc5614afff01bff3fd22191600f5014d9cffd852f4105387da3c33939851775af45556774969bd617293f75225f92d51d679e6f0752e7a1ef48a3e0b305a1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}