{
  "manageEntity": {
    "action": "Save",
    "entityId": "1255723726",
    "entityType": "Track",
    "nonce": "0x7a6047122eb12f4c521cd5933f61b9141c232adbae7541ea25494fde69ba1e27",
    "signature": "0x485056264c6d8c683a7a9c99caee36ffdc5ae66a76f158b919c3f79195a117c272e5924766db2c0634580cf0b68b5de57a07e7aebadd0dc06f7d9301840764f81c",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}