{
  "manageEntity": {
    "action": "Save",
    "entityId": "978931738",
    "entityType": "Track",
    "nonce": "0x2d2e6e8ae6a65933ee850f0761107d2775ffe3538bf1904e74327ccfdb8a4e92",
    "signature": "0xcb0f0a73284f5ebac184d3b9d2bec93172e1da4f21283e726d16e7e33c4801e07a22f22d83ed21e69141e0e438e64559375d324bee69a51b8e13400acfb2b5221b",
    "signer": "0x05aba01c97C4F182D989670622abE9c797782dD2",
    "userId": "508263176"
  }
}