{
  "manageEntity": {
    "action": "Save",
    "entityId": "1424917223",
    "entityType": "Track",
    "nonce": "0xaa8aa5e0196c97c58611647f96b17f48fe301d4e5a44ccddb409d19249d260ab",
    "signature": "0x4239e89928314be06881d5df5bd355d2824a8654fa246a05ec52be4dbd6da1a825cc46d43a2d6052cf9e1994a1751f993f5847789200fde154ed127df3f85a311b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}