{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "337364291",
    "entityType": "User",
    "nonce": "0xb8cab8106894a2006378f0d506faccfba24327863658760ed4e7031da8f7b908",
    "signature": "0xc90b1335f352672e8caa329bf6ecf1c7a325601c62c21397fe7e422847552d143c9781034a292ddd3c2280d89efa788bf2b6595a952975fb1fb23a884dee59fe1c",
    "signer": "0x44Fe9338D9d1405927C73FDA0be0F36ae481Cd39",
    "userId": "983568397"
  }
}