{
  "manageEntity": {
    "action": "Save",
    "entityId": "293474",
    "entityType": "Track",
    "nonce": "0x6ca03ddd232cef67b699927a4f2a4651cc59b99227835327be43bf02e243c54c",
    "signature": "0xd2eaf719a160a91f5092e7dde78b9b7133ca7bc4be2efd0f5ee4f6ab1ec9a0f7406bb10871b0f419143e83e86019469a0d3dd0914426004150bcc467439fc5c81b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}