{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "354403",
    "entityType": "User",
    "nonce": "0x1bd902ad5e3e3a7ee110a3b9be817d18f01b37016c2d0e9e0ec6d757ad92ad07",
    "signature": "0x63dd8ff6de87f10086abf4b0ae19d7585bf946db58f2332da6d86f66e46484650d6a26b9bfa26f8ddbbe10ea71abdcde0480862e614748987b7ef8057151e24d1b",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}