{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1881270",
    "entityType": "User",
    "nonce": "0xa912b3f546b945cfc6e5549a9e3d4cc94059a89f36d2366eaced6ccab282bc6c",
    "signature": "0x383e129f104e3a8cb42ef58053babb00ebf59315f06e15c3c7cade9ee5bb22b3211eb9a13681055ebc4888be350e90a02bdd977ec1a28a853012c182eb5162b81b",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}