{
  "manageEntity": {
    "action": "Save",
    "entityId": "284907171",
    "entityType": "Track",
    "nonce": "0x2cb8a448413163b5f7432126948238fb043361be895076e2ce113f804a4deb29",
    "signature": "0xe7f98d6f5638843730fa5f17fb3ab9aab740e46dc3ff69855e637a97808c77422a8c8902e907770571bf0f28d16629fae68874b23605a9894ebf3bbf69dd54bc1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}