{
  "manageEntity": {
    "action": "Save",
    "entityId": "976514605",
    "entityType": "Track",
    "nonce": "0x294972154b1d91b4ba40a1af6ee8756805bdcfb9074ca45081551118a12f01e1",
    "signature": "0xf8718a8ca3e6779fa673f54594a13b777985e40899ebd403e3fc4e81df71d26d0526519a868449e12af452113a5d999928476aacce96f9be2187999d9a472e541b",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}