{
  "manageEntity": {
    "action": "Save",
    "entityId": "808837045",
    "entityType": "Track",
    "nonce": "0x74202d914bb52409f5779bcbba299fb49f9330ae3d4ab595ae35e0957276537d",
    "signature": "0x7a6206a07ccb258c9e94633c736e0cac132d23289f28496c2546875785558e5e6cd544dc71dab6f45fdb9b864838c3e1205a1ca7d41340c1c44ea4de97d6ce9c1c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}