{
  "manageEntity": {
    "action": "Save",
    "entityId": "559545",
    "entityType": "Track",
    "nonce": "0xb76c95884afbafe09ec99d9df894eecfedf2950f120736f94bd99bb7736d9247",
    "signature": "0x84e86439d3e8895f01ac1b4a1f6aaac567c35657e5130cf79d3c84ad52269a720768d14bf83e3d0db6327d701135072a20449092dadb86e503a64a9d25509bb71c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}