{
  "manageEntity": {
    "action": "Save",
    "entityId": "780535127",
    "entityType": "Track",
    "nonce": "0x3e67cf820078f24051f3f4d412b9da8e2203d71428a0f0fcb223694c977eaef8",
    "signature": "0x19de490d3d722b4de24469ecb71ec3665f47e44feffabe6fb342f6f1152c76325d33d2ca41434f64ac3037cb79676cb39e4cc4b191125ec1a5d735fb01fcb93f1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}