{
  "manageEntity": {
    "action": "Save",
    "entityId": "327183",
    "entityType": "Track",
    "nonce": "0x837f5894dccfd9a40f481c6584cdc6a54b1699fc3f432e5512a8d4e2ef48c8cd",
    "signature": "0x8d8f64976047e934e1922955600b6032ef665199ba17a1f39ad01576a5036d4e749058529f81af180b7dbf8d5cdde99a5460e5e8f80c007913de1fe2185842f31c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}