{
  "manageEntity": {
    "action": "Save",
    "entityId": "3676",
    "entityType": "Track",
    "nonce": "0x7acf08746cccc57d6579ec995aad6060933d8be3dedce4f5be9da65db5641683",
    "signature": "0xe95581dfc91acec50421f4dee80e87e9ddf4ca7ae4d12bc78ee34765359985366531d2c4fba52aed4a4a6836e4297b47e02a2e1dbb3ec2a32aed8e398694df9f1c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}