{
  "manageEntity": {
    "action": "Save",
    "entityId": "1536979377",
    "entityType": "Track",
    "nonce": "0x4689280cbf87a3a9d68aff3180e152d66efbc63b74d2a3bf57b400ebc9380070",
    "signature": "0x3b895b3594c63858e659f97f5703ab35331b357e43cdb0f271fb2cbdc1d600b04e4052a37877cc4ccba3096eff45660132b126edd43bc10e6295f3f1ed8b3ab31c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}