{
  "manageEntity": {
    "action": "Save",
    "entityId": "38917803",
    "entityType": "Track",
    "nonce": "0x6a3a81e1e864719adea5c85b06c4b617d268a9a4725413b44807df236103e83e",
    "signature": "0x3d2e277ca0dce24accfb1a4097ffc466f7be94d6c40f4ca353c76f99f39680761a34dcb66283f52096795627c9554f57ba99f5085367c1e2a0f8d9d79b4136cd1c",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}