{
  "manageEntity": {
    "action": "Save",
    "entityId": "705506478",
    "entityType": "Track",
    "nonce": "0xd54d7216d79d50c648bd36bdb96b1a7783ed6dfd69dcfe5872aac1e36fc6ee43",
    "signature": "0x5cb08107afd661696c959c3dabb8575ad3df8953df3d6a226c89315ba064bed6355b9ce50e7a395729ae89668eaaf8a629d0a8dbfe643411253857777274a2bc1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}