{
  "manageEntity": {
    "action": "Save",
    "entityId": "680944824",
    "entityType": "Track",
    "nonce": "0xf7c7943730f5705d0b56dca51af70c7c675bde18c6b4f1f871c4beb5a648e864",
    "signature": "0x0af4f8416b72209d3eb20e76ae0c460d65d522489f2a8c07c7b4c1a9ffa27a623f3644c258fe85bf385395071f120c878092ddc26b217e4eef8abaf71a3bb96b1b",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}