{
  "manageEntity": {
    "action": "Save",
    "entityId": "1789066386",
    "entityType": "Track",
    "nonce": "0x0d5bc4838033fbffed5bf88694695556537c727d63e6dcdcb235e4770a5f8710",
    "signature": "0x2e722a2ef82047f04b0e049739d7f4afc90027ba558574f5a606a6781f0b4e557995771be6f426fe0765bafbb2ac096b5a3966fc220d315748fb7885c4e13da71b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}