{
  "manageEntity": {
    "action": "Save",
    "entityId": "221935726",
    "entityType": "Track",
    "nonce": "0x14b1718efe5674ef9bab0ab893b40250833aace25b69c472b9e5cf0e0c6f91c4",
    "signature": "0x36935ea924ae9d0e2fed10eabd7f7660555041e7899254f04def86d33885a6a3098a10274f873eec1476110888fa13eba9f86549f312fcf202c56b62a446e9e11b",
    "signer": "0x036B1ee0d2003ae5B5E252d58647d13f0e588EEB",
    "userId": "161353174"
  }
}