{
  "manageEntity": {
    "action": "Save",
    "entityId": "823474415",
    "entityType": "Track",
    "nonce": "0xbc601e470fde0f4743096632f134caf76ac5217659484a4fedcd8add2d440081",
    "signature": "0x899400339bc47838a55930c5224ccf66e2785672629749e465ee2d19574fb16b3a2ea591b3bb12ddd58e305e637b4560b0319f6853976b3fe450fc7341741cff1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}