{
  "manageEntity": {
    "action": "Save",
    "entityId": "2118475501",
    "entityType": "Track",
    "nonce": "0x643a763166c109c4a939f94c457a0d8817aa538f9f646b02886162242315bdb3",
    "signature": "0x7105b172add2e21156b1969ad393763a2fee16b7d77506f9bc79afb7a8cd78ee1a5f8ab678f5275adba1132180cc2733f9ec24b623ecfe2620f3121f283350ad1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}