{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "670307808",
    "entityType": "User",
    "nonce": "0x7e719576663d1a0aa5729f3d71f93152e0fde637b8a6564dbcd6df262f4089b8",
    "signature": "0x09558b0a9705da1cbf1c30b0c08a328a4f4cfcb2347a503e5ec4c199b799b0eb0d0979e377bb79195a3030096db175a0d2e470c12a6e094f87e122b0613cb8e01c",
    "signer": "0x1F9dC682fadBAc94c0Dd4ca2232a3f490704a737",
    "userId": "737872723"
  }
}