{
  "manageEntity": {
    "action": "Save",
    "entityId": "838137456",
    "entityType": "Track",
    "nonce": "0xfcf011dfb46362013abe3e3468956115a1d41caa3a5804def54af068d30bea6a",
    "signature": "0xaa4775928910ffae155487b2fd3641ccff3f4046754fc1b8f4451deb4abd774510dd7af90acb9165aee9b6c80403a34c3e3ce2cfd8570c149d8909135ad898301b",
    "signer": "0x036B1ee0d2003ae5B5E252d58647d13f0e588EEB",
    "userId": "161353174"
  }
}