{
  "manageEntity": {
    "action": "Save",
    "entityId": "1942771149",
    "entityType": "Track",
    "nonce": "0x3fc4f8480feb807323568cd81a8313c01c2bc6d0df23788b84fcfd0217dcf462",
    "signature": "0xa6d59c818f780ed385ce5bbd501a75e9d61c0c5d3790674cb615eda3b998a4942b67ef260b0821dc0ba58a5de96b81ebd7dd54c196e51aeeeebbcc6ad38263d01c",
    "signer": "0x375963f281CEdF4D9D180496F80A256D574daBa2",
    "userId": "981824750"
  }
}