{
  "manageEntity": {
    "action": "Save",
    "entityId": "726397655",
    "entityType": "Track",
    "nonce": "0x28286ec4a400ab3ad568e705cc0550f2b984250e52e2e40dee9a0922d57023b3",
    "signature": "0x9d65204e2d7e5c0bc336626b584e58fc47b9b7eba2efd8c0f90b8303f269e97a6ef64c52db3d67b4fd9cc45f627f64a9503e45362900f4ab7e38814e57c585ee1c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}