{
  "manageEntity": {
    "action": "Save",
    "entityId": "462099711",
    "entityType": "Track",
    "nonce": "0x56c47149dd099a0145fe69e0e8e155b9cd0cea61be16e93f2fccc03f7a0bc948",
    "signature": "0x681edd547791be65c0b48400e83a9dbad768f6abc072cbc39e408696244878bf18023c67e91389aa7780c5e826d65be4320b74ef2be00329884de34217f019371b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}