{
  "manageEntity": {
    "action": "Save",
    "entityId": "456713033",
    "entityType": "Track",
    "nonce": "0x776fdba50c055165d1acc3c866beb5667180fa29ed9bf31512e5123ca8e65a57",
    "signature": "0x1f56f4bd1f7e244d65a5e7623d1395acfccdaa9a83aaf0e99addd989794230c957eed3d02f3eb73dd778c2173174f012641df325be262acf4e521760567e02791c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}