{
  "manageEntity": {
    "action": "Save",
    "entityId": "979657613",
    "entityType": "Track",
    "nonce": "0x72c86ebeacdff392174a06cbc517694f71a14e752d43c6b8b8c59fee8c3c6ef0",
    "signature": "0x5db723f5d080f85b979315311122d9714f9ced27e383eb3e3720528545c5f7380092588de0285e2d838f10030c652db5ac87febcd2b9499257b81298f6b76d1d1b",
    "signer": "0x796D60E9fE921C82Ef20f6329e27dD246392f542",
    "userId": "809803"
  }
}