{
  "manageEntity": {
    "action": "Save",
    "entityId": "1577606901",
    "entityType": "Track",
    "nonce": "0x0348e7da6d01ace4c4d9b2a2122872347ed452e66a67cb358024881b20ee57df",
    "signature": "0xa67565e39b968c6d3d07962015a99f9525039151ec025e524f07942e41aa2c4801f9d4d42fa54f4ebaa8e77188d1787164c397f0b973086700dafca9334dbd7d1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}