{
  "manageEntity": {
    "action": "Save",
    "entityId": "1085592960",
    "entityType": "Track",
    "nonce": "0x189236781794bb808865da0276200c1d72e3c0d8eb3ca1078525116de9259a6d",
    "signature": "0x20714e92ff986d1080959620a8e5b35fcc9e0897037a5741d485884225228eb710ceeb0e9307785f417c99584fd3a267b2ddeb86d03a20b244a3edeb67960f501c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}