{
  "manageEntity": {
    "action": "Save",
    "entityId": "536977153",
    "entityType": "Track",
    "nonce": "0x24cd3d97c5f499381bdfbc5d033093b52f66709ee1eb3c223f59917af3a12aac",
    "signature": "0xf2cd02f5c2c987b27b4f088985de98f3ddab6baa809406d6d5cd32dd5bddbd950127271632b25c22a6bd5abad25ba2eddcce81867ed5d6295516ca9a03eb43b11b",
    "signer": "0x9d71fCCB64e7575736E44460e714Ce0fcd69cf08",
    "userId": "16198441"
  }
}