{
  "manageEntity": {
    "action": "Save",
    "entityId": "1932990543",
    "entityType": "Track",
    "nonce": "0x7f3c3f47a5a2393ea15fd10d3714e1d036936927c61a56861214d2f99393aa76",
    "signature": "0x349cad6c065d968eea872cc403641960d4f3084a272e4329a7480ac44a725e1e2deeada01ab3ec9ebe0c82db44e3103399cece3877628f47e47e3a45043a8fb91b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}