{
  "manageEntity": {
    "action": "Save",
    "entityId": "1935175358",
    "entityType": "Track",
    "nonce": "0xf7ec0e39c95157d2c0e5657fe950f32c0f814a22e462a1ff045b3500ff5ae454",
    "signature": "0x26dbfff5519cff773754aeb9bf4db79757208a935fcac3bb66431ccac6111a023c809d4f8d8d37bb7fc5a1772f2c639e20d16bfd6b71097302045029647261d41c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}