{
  "manageEntity": {
    "action": "Save",
    "entityId": "819507415",
    "entityType": "Track",
    "nonce": "0xd283316abfaf4097f595f2ca47ae7dfee86b0fe0bf37aca783bfc1055be35436",
    "signature": "0xdafef16fd8ab581c494dae2808e7baa08f15d6e9fe5fc8a17d5bb05f72ea17c34f93e09c261caecab9feacdf7d9108d13d5b71b90796f914856ce51d0d664f631b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}