{
  "manageEntity": {
    "action": "Save",
    "entityId": "1077210",
    "entityType": "Track",
    "nonce": "0x71ded37b564a57c20c593202cd137b27dbf5de57b275ad95b9c71db33b12d2b5",
    "signature": "0x18f6db7839f7e24a1f6177dcc7bab4f15f32a5dc32fd39b34449763df31a0dad65d484de3fbbd286dc8cc70bc1b8a34debf279597ad86f23c76569cfbc6764471c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}