{
  "manageEntity": {
    "action": "Save",
    "entityId": "1111691",
    "entityType": "Track",
    "nonce": "0xdc94c6680d0a7f9e6f2db9d1759b50f5727e6cc75cb7a9fe960d7e2534f3c73d",
    "signature": "0xff40875fd9530a2b3d1b17abd1fdf19fa6f90025085a290204c77b8a1d1d3ab059c05ea08636139a2caf79ea62ecedadab90e52334d2cf3376c2fc7ee0b2a6691c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}