{
  "manageEntity": {
    "action": "Save",
    "entityId": "1522175763",
    "entityType": "Track",
    "nonce": "0x54a9306693d559412413ae37d4de15e5613f0b4a3afc2eca5141a32c890ed7e2",
    "signature": "0xf5840ad70b185bf587fbf672c755421dc7c0d036a9ac8bb3d0d05c14c809920716e6cc6ed302da9dc7c46ba591678a2a63a0fb5f935d37d5635fb95203167c6c1b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}