{
  "manageEntity": {
    "action": "Save",
    "entityId": "1515910239",
    "entityType": "Track",
    "nonce": "0x0d59ec726830b92118b43d0474a2b4242a0722e5a769d54b4cac0ea80f5a46b0",
    "signature": "0xa8fb568514c18941bb9b635f658a70bbb2ba9be3035cf530546801b7ceb3b3743f47bf5a6b41bb854efa68eee02cef96367f96fd7c00aa6312e11f524839646c1b",
    "signer": "0xD71D6a61b797d5436c8d291306fd7DbCe6257Cc2",
    "userId": "117522"
  }
}