{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "664568012",
    "entityType": "User",
    "nonce": "0x77377dad607ea9746a9dffcecf9b3aea8159c29619f6b761c4d950e1af1db838",
    "signature": "0xa9a17dd3ea0c4d741e4710671e95c1825a98744504fcb64b9a7f07fdeafd73c1796d840789f26006e460f22ba204ada3c8ef15f6e1bee90ea6020e4b38e28be81c",
    "signer": "0x0Dd73e4D3bAa9c25c83FF36DdAa22F88B115b08C",
    "userId": "12728"
  }
}