{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "3407",
    "entityType": "User",
    "nonce": "0x6b51a37e11579b0704b5f88819e3f4c0ccdf8c58e9d8a1d6f2621db9f8c48b54",
    "signature": "0x234e4909d41f1cc09d200c71985384990e854a230efb2a6b329a8b55cb4a1c717f418ebaffa8d3844f742e881a9e5ee9021d7d473ed175ce6bc41d26bb738d341b",
    "signer": "0xfa0b7c5C31eBA7622AfE516eb7b8aD45EFB4BD28",
    "userId": "734513560"
  }
}