{
  "manageEntity": {
    "action": "Save",
    "entityId": "688811946",
    "entityType": "Track",
    "nonce": "0x517cabd544ab4aa7ad5a86df45b1ac1f4a45343b711694e826518fd36dccd956",
    "signature": "0xef78223cbacc3f4c0bc5aa4ddecba7a66fa98bcd244e94399cca7c30a6e1fef20b82777cda50a22ddf0c5873718fd38736ff74d258109a70b821423948092f941c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}