{
  "manageEntity": {
    "action": "Save",
    "entityId": "642765",
    "entityType": "Track",
    "nonce": "0x200f50d707931af6401766ebea9297296e4834784697cf929eb7c6bf67612d52",
    "signature": "0x69f93ef3b81cded18eda7a087f2a964132eb0546a9865eab4c4d56bcd5877f857e985f8f0da5307de1b8f72a0171b3e4e188c3ffadfa1a32168ed1f381be68ce1c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}