{
  "manageEntity": {
    "action": "Save",
    "entityId": "715297754",
    "entityType": "Track",
    "nonce": "0x36ed8995591d0c1c43e2d451372be79cf6eef65cafcd4a3d0147bbd30d09e4f6",
    "signature": "0x6c7edd2f6fbf027a175c354109942095d98bc08a2afba9ab0ec07131a7c49cc014530a0e41373cf531ddd402031bef2e8e13e5ceab4f2114bababcf3e87a3d141c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}