{
  "manageEntity": {
    "action": "Save",
    "entityId": "849141",
    "entityType": "Track",
    "nonce": "0x20551fb5a000869995ca8e5621172a45b5908704c32b5d097dca85d210fcc8c5",
    "signature": "0x774343b533c7e417a9fccde816741f9973de9c3754a214ef6adee130f715a426277106f046adf02a6be460057b271302794dc979b425c1b0751023edc9588c2b1b",
    "signer": "0x934E45BE36e38037811AEb6F8eD448164c45408B",
    "userId": "582278090"
  }
}