{
  "manageEntity": {
    "action": "Save",
    "entityId": "1474035803",
    "entityType": "Track",
    "nonce": "0xe6515ec228b61bf84b28af5ccfbdf8b45b1a3c4fe61ab64d05c3cc43ed3f71f4",
    "signature": "0x6ba5d5cd295d9ffd55fb074971fbd9ee7248e0ffd6abb8fb601c44efe04e9cda06c80ec69b777a5a25d94282521e895b8e4f117b4f0c57ad06224deb0d222f951b",
    "signer": "0x1F9dC682fadBAc94c0Dd4ca2232a3f490704a737",
    "userId": "737872723"
  }
}