{
  "manageEntity": {
    "action": "Save",
    "entityId": "155673996",
    "entityType": "Track",
    "nonce": "0xc527d1c7f58167e1cd2c543ac1c86719bc029f448bb9024a1e37a35029fc6622",
    "signature": "0x4c1a29d7b22cd6b2122cb3ea2b659cc84ab6d8c0098bf0a7f2babd54e63b723812f1a8fd3faf2f34e060f901cd80a3494d1e516bf52b119e1a6c8cf8bde190041c",
    "signer": "0x8FF85C5AA450a88f13FbD5170e24E2a3eFF32518",
    "userId": "311829956"
  }
}