{
  "manageEntity": {
    "action": "Save",
    "entityId": "1706766045",
    "entityType": "Track",
    "nonce": "0x6b5da30e36e735d61ebeee8b88863a62306fbdfdaa6e8707e8eaf9eec660348a",
    "signature": "0x34adb57984fc93403c7912da1974de96064173495a88a13aaf5598120e7668e65a5b2b84eea468758eb3739f456ab426c8edb1bde1d01db9960d1700e1f9c9611b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}