{
  "manageEntity": {
    "action": "Save",
    "entityId": "1131476051",
    "entityType": "Track",
    "nonce": "0x9c3d57a18198e654a11f706c0c295a5091f5f66529da45e68571c948d3bdc19c",
    "signature": "0xb07a617fa7cfb1ea8c0648ff8e9c7da58592507ef6eccb22f14a87282d16f11962d64505485bbcc396fd540aa7247d166d3885e93b5e95e136a28399ca430bd11b",
    "signer": "0x4dafC3e774A1033C5604372f17ccBDcE545f478D",
    "userId": "889450527"
  }
}