{
  "manageEntity": {
    "action": "Save",
    "entityId": "955341181",
    "entityType": "Track",
    "nonce": "0x7fdfddf4cf7972b0b7d0cfcd43e89d5b5bae01eb284b0feac5a7c17f99946337",
    "signature": "0x943c3bcfdbaa765e23922709e0382c5b6aad18b532a7cb4a1e01b9ad12766d8435e4ee1871f4234f079cf3a78dad99398c9b59fc11038fd4d1bf51ab0fa4eeca1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}