{
  "manageEntity": {
    "action": "Save",
    "entityId": "428861171",
    "entityType": "Track",
    "nonce": "0x63f43cca93eeca8ce73a530d0a66f8e6f31484e68efbbbb2edfb30928c268334",
    "signature": "0x7e0c888dae73a5178a07818397dc21b004645fe312a1c47eb33b34094dcfc6c12c76c187efdc5d60f6cd21a553b3d1d5a238ed3771796cc4669d14b121e000ef1b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}