{
  "manageEntity": {
    "action": "Save",
    "entityId": "206846269",
    "entityType": "Track",
    "nonce": "0xe1acf2343d6e47b19ed3148722e5da76f28f1c6726e021212f40b05387777032",
    "signature": "0xb6e4d102e939b4c5e2024a45f463b2018024e41769264a3f393353774681fbad2d3a9f79a16132a939e718a5936db7fc296cda668aec9e197601b38e5beffe341c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}