{
  "manageEntity": {
    "action": "Save",
    "entityId": "385686753",
    "entityType": "Track",
    "nonce": "0xcd943bea79b29543bfb08b6c7f2e7134ebcaef2bc16b5cca0d5f313860a7b27b",
    "signature": "0x3fd7706e13086bae09e91dbf5f7d215b391e697e0c52fee8ce6227f7aad9422d081880d9ff56194b5ab0ab29d1080c333bc1553518bff318ee32d36d69025c471c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}