{
  "manageEntity": {
    "action": "Save",
    "entityId": "1858603048",
    "entityType": "Track",
    "nonce": "0x6583bce053a83311c6a1d3236a8bd6c9d7bd6fb8afcae31cb6b8c68741f6e756",
    "signature": "0xc14454474a4c5954976cab169dfb73161c75b08d6c28e1fb2e7bd2f875a40c504de42d4268bb59cf97b0b879883296b51e1cb5bdcd721b9b19fc041aa18433451c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}