{
  "manageEntity": {
    "action": "Save",
    "entityId": "323559",
    "entityType": "Track",
    "nonce": "0x99db1a9a17ade808a3118f6441ed4c3846c7be7053c9f262fcf15d9a20a45a73",
    "signature": "0xa6d13dd126431b66409f948c9af256d64ba67e285bd63d9c7e7c2aa3141b49b1582ac842523dd9408281b4fd0cf7b9f4814f3808d6795b3d852f3930b02337371c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}