{
  "manageEntity": {
    "action": "Save",
    "entityId": "1487507625",
    "entityType": "Track",
    "nonce": "0x06efae132a1fb232724dcb73bdd1efd5498751dbc357c817c3f9fe061c7e61d1",
    "signature": "0x15f1c6aba729c17e4daf61807acc7521564e56aaa3d891aa6865545249143031255671266d6195f9a7673144a1b12985117d8a24064cc744d2fe86a90b9330f71c",
    "signer": "0x036B1ee0d2003ae5B5E252d58647d13f0e588EEB",
    "userId": "161353174"
  }
}