{
  "manageEntity": {
    "action": "Save",
    "entityId": "2125427239",
    "entityType": "Track",
    "nonce": "0x7c44b72b436c53ee2b8cc556f6586dd866f85b61803f1df9ae9fb174aa9e7948",
    "signature": "0x0daf0ce1948c3b93f7a155ce9896e735ae0d85182b4321ce3842a315c92e95946400416a27f87b1a99c7abadb080504a4a0be92b4a2a44ecddf2bc1de9429e541b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}