{
  "manageEntity": {
    "action": "Save",
    "entityId": "455988898",
    "entityType": "Track",
    "nonce": "0x75711cea6085153f05ee0a89eab01394d5bf75564e61cc04a00ffd9385443e6d",
    "signature": "0x732f40f3e056a2fb6a3ab95fd00fa53920f9841877a0ca9505f6fa8a63f1762c0ee084106e69ba2bcc778590166ad1f01a3f966a6298a15d7c47a22a985eee291b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}