{
  "manageEntity": {
    "action": "Save",
    "entityId": "1303690100",
    "entityType": "Track",
    "nonce": "0x718c9feedca6efda2548098184fd82e93b409195d0364fc21ecc1926920db850",
    "signature": "0x8fed6684a9f6acf7cb0cd9249f9e32df2139c0e851436a4edc3aa290258299bc59a20cb8d4eb5a7780c1646f4e8f7250bb54f9d21680e33edaf5ea1373d577721b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}