{
  "manageEntity": {
    "action": "Save",
    "entityId": "1119479",
    "entityType": "Track",
    "nonce": "0x271c348d5b0e3a99f519c089943f663c46cb6d09db922d47e85a6fcfb30090cf",
    "signature": "0x06bba8753858119a8f45fa2061154d23b3e5c705894daa9e614525774a8a96d72adb4bd775d5b33cdf9ac03ef6424ca529e1bf0b6072b56754b2c84d6df281801b",
    "signer": "0xfa1f98f0530E55C2BEFA45f0F1B3A699b4559136",
    "userId": "149566028"
  }
}