{
  "manageEntity": {
    "action": "Save",
    "entityId": "1808068181",
    "entityType": "Track",
    "nonce": "1785859877493228282",
    "signature": "0xf2d28c84c7c6119b9fc4af0a21457870241286c0c88709e39aa8243fba4f563a7c065826333e758eadf10dc6339fd615845de3a773abe3bc55b7cbd9ea95cb401b",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}