{
  "manageEntity": {
    "action": "Save",
    "entityId": "1566674376",
    "entityType": "Track",
    "nonce": "0xd323dc177ee80157d9ea9e0539d286c22e7888915c18426ee125e7def2490d4a",
    "signature": "0x17d2926967b9a7dd2884c9413ffe3a9c0bf5e3517e763c373d2f442c7a4a41f12e5e71a094deaa17b3d468a8469c367f94ec7a8ef334f1a0e445c108b65f5c9e1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}