{
  "manageEntity": {
    "action": "Save",
    "entityId": "457575682",
    "entityType": "Track",
    "nonce": "0x9c59be82cc2cae52560004f350924de5e45d5d240c6af6f62fbb256ea1faf759",
    "signature": "0x94a806f7a730528d23cc40d3fdc9e306970b4f1d4dc916e072f87c07b79b88fe47a13e3161717e3c8e87df11f747b184e2b0bbbfae9a455b0d745780c9c455421b",
    "signer": "0x934E45BE36e38037811AEb6F8eD448164c45408B",
    "userId": "582278090"
  }
}