{
  "manageEntity": {
    "action": "Save",
    "entityId": "485864",
    "entityType": "Track",
    "nonce": "0xea123010f0d162ad718c8349970d87060a514e3ff14935265d07258608c6d093",
    "signature": "0x04cf0d247dd7d90baf5e98206070d778f71c1df96d74d4ec931571b09b4152857197bedd2246d472ae6d11c075d91d21251c3a216a3fd8c3400b77f031d4a2561c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}