{
  "manageEntity": {
    "action": "Save",
    "entityId": "1974247929",
    "entityType": "Track",
    "nonce": "0xe1d755d742fc2588a0870162ee4d8d5a3d467823cde39aef192720204f4ddd1f",
    "signature": "0x452b16d8f11b6efcdad7a28f6a75510fcb1e4a875b9aecc696cefc7519708aec5f370b2b89d9d05ee285522cd5f633f13c8ef563114dd03d6c4b6dba5ba4b7b51c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}