{
  "manageEntity": {
    "action": "Save",
    "entityId": "2132194076",
    "entityType": "Track",
    "nonce": "0xb4fcfd8b041cee63ccf25e917aae222caf140474fff80ce68484e433bd69e979",
    "signature": "0xfb2cff1a03c0e599a14eb765282801f8816d11ab5677f21f6566e30e5d06716b6d5baa82e25d4eb124e227c3ed23f67372146900de726fc83328b17cedbd174d1b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}