{
  "manageEntity": {
    "action": "Save",
    "entityId": "1732318664",
    "entityType": "Track",
    "nonce": "0x15d021c439ddae3c49a2de712df53cc26148573a1886945ea4b806826547806a",
    "signature": "0xafa6dd11a92b231e73203497cb4b4bb94c5770f656900b5c54bf6d5041528d2336e6207a67f2f0e2e6fd308a3ecc44c2fef4fb602c2948b8fb0e2a0c374f872b1b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}