{
  "manageEntity": {
    "action": "Save",
    "entityId": "1760101400",
    "entityType": "Track",
    "nonce": "0x5cd4cf901c460a56d592c4e9be0b407f6006d4961134ae95bfeae4e0967c148a",
    "signature": "0x5e37b74d2e31bcd4c3eb802ecbaa680865b64245954ac4ce8dc31a217572f48b1404d079f85424297d8953a219b63bf232023a866e349ffb13f27e5e620139041b",
    "signer": "0x1080460F21DCc82D7160d2C77DaAb22a92c4dD22",
    "userId": "162106877"
  }
}