{
  "manageEntity": {
    "action": "Save",
    "entityId": "541163",
    "entityType": "Track",
    "nonce": "0x136815828a93565f8cb58d33d418fb6b65520fb1cafc1a760bea2d0d91a2adb3",
    "signature": "0xc40b3432e0bd9a595824ebde723bb0500e0ae3bcb67f10e35b49e05554066ad275dff902b54b6d8438b7d93fc0de61ac6e7db60c19609865e56409561b88f7ac1b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}