{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "209310",
    "entityType": "User",
    "nonce": "0x8504fb4f75101afed823efb1359642284d612a3fa0b723d5ea9f8b29c3f54f08",
    "signature": "0x97362f7ac7084f1f6fb3583cc1c51b8d8d83bb96ccd46f38cab79836fbdcd7d9179b5378b340de1fb402ec26793d7c65f5772e9efdc50585b94f8a77f05f3f191c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}