{
  "manageEntity": {
    "action": "Save",
    "entityId": "960347",
    "entityType": "Track",
    "nonce": "0xd43ed821bf504c3d6d5732f75039815d143b775d61783da00dea4ad0eaa935d0",
    "signature": "0xdfc2b1c74f7c88d45dfe9b9c2771c9424cecd106c722f54760e0d4b135d1b34a01bea96d8d2e6789688cb8528005373bdb4caa053d98508207ec9870a1d3163c1b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}