{
  "manageEntity": {
    "action": "Save",
    "entityId": "1789277703",
    "entityType": "Track",
    "nonce": "0x033ea46427009a91b6262acab1b1e47d5361d5f6dac8e9f2ed23ba365ee1cdb4",
    "signature": "0xfb9a87e964571a512d56215eaae795bef8d067524f466f939d02560081e7247e24beacd150a27ae9554553775fdbc714424eb419a8125493a52ad79e837b30e61b",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}