{
  "manageEntity": {
    "action": "Save",
    "entityId": "718212677",
    "entityType": "Track",
    "nonce": "0x1c34aa38d94c908299835c8bee6818baf38c23eecd62c03b3d8f3a2e878ba8bb",
    "signature": "0xd73b79b5daf541322aa28e1567d2ec10d77944437a7a3235d5090d36a57a41ac3c2fccdacae92c2290f7e4eaaa0bf8c059e09d2659c254ef86f73e233d2e218a1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}